14 Best Watches With ECG Technology to Monitor Your Heart Health in 2027

Among these watches with ECG, I’d put the Apple Watch Series 11 first for iPhone owners who want an accessible ECG feature alongside a polished smartwatch experience. The Withings ScanWatch 2 stands out for buyers who prefer a traditional watch look, while the Fitbit Sense 2 brings ECG together with stress and wellness tracking. The key tradeoffs are phone compatibility, how much health data you want, and whether you prefer a full touchscreen or a hybrid design. ECG availability and features can vary by region and may require setup in the companion app. Read on for how I’d choose among all 14 models.

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Key Takeaways

• Apple Watch Series 11 is the broadest fit for iPhone users in this lineup; the three listed case and band combinations provide size and style choices, not different ECG capabilities.

• Fitbit Sense and Sense 2 offer more wellness-focused alternatives, but the original Sense and Sense 2 are separate generations and should not be treated as identical models.

• Withings ScanWatch 2 takes a different approach: its hybrid watch design favors a traditional appearance over the app-rich touchscreen experience of Apple, Samsung, and Fitbit.

• Samsung options make the most sense for compatible Android users; the Galaxy Watch 4 models are older than the listed Galaxy Watch 8, while the Watch 4 Classic is specifically identified as renewed.

• The Garmin Venu 4 listing does not establish ECG support. Buyers should verify the exact model’s ECG availability and regional support before choosing it specifically for ECG readings.

Our Top Watches With Ecg Picks

Garmin Venu 4 45mm GPS Smartwatch with Bright Display and Health Monitoring		Best for Battery Life	Case size: 45 x 45 x 12.5 mm	Wrist circumference: 135–200 mm	Display: AMOLED	VIEW ON AMAZON	See Our Full Breakdown
Apple Watch Series 11 GPS 46mm Smartwatch with Rose Gold Aluminum Case and Light Blush Sport Band		Best Overall for iPhone ECG Users	Model: Apple Watch Series 11	Case size: 46mm	Connectivity: GPS	VIEW ON AMAZON	See Our Full Breakdown
Apple Watch Series 11 GPS 42mm Smartwatch with Jet Black Aluminum Case and Black Sport Band – S/M		Best Compact ECG Watch for iPhone	Model: Apple Watch Series 11	Case size: 42mm	Connectivity: GPS	VIEW ON AMAZON	See Our Full Breakdown
Fitbit Sense 2 Health and Fitness Smartwatch – Shadow Grey/Graphite		Best for Stress and Recovery Tracking	Color: Shadow Grey/Graphite	Battery life: 6+ days	Water resistance: 50 meters	VIEW ON AMAZON	See Our Full Breakdown
Samsung Galaxy Watch 4 40mm Bluetooth Smartwatch with ECG, GPS, and Fall Detection – US Version, Black		Best for Samsung Health Metrics	Display size: 40mm	Model: SM-R860NZKAXAA	Connectivity: Bluetooth, LTE, and GPS listed in product data; title identifies the model as Bluetooth	VIEW ON AMAZON	See Our Full Breakdown
Withings ScanWatch 2 Hybrid Smartwatch		Best for Long Battery Life	Case: Stainless steel	Glass: Sapphire	Battery life: Up to 35 days	VIEW ON AMAZON	See Our Full Breakdown
Apple Watch Series 11 GPS 42mm Smartwatch with Space Gray Aluminum Case and Black Sport Band		Best for iPhone Owners	Model: Apple Watch Series 11	Size: 42mm	Connectivity: GPS	VIEW ON AMAZON	See Our Full Breakdown
Samsung Galaxy Watch 8 (2025) 40mm Bluetooth Smartwatch – Graphite		Best for Samsung Health Features	Size: 40mm	Connectivity: Bluetooth	Compatibility: Samsung and other Android smartphones	VIEW ON AMAZON	See Our Full Breakdown
Fitbit Sense Health and Fitness Smartwatch with GPS, Heart Rate, SpO2, ECG, Skin Temperature and Stress Tracking		Best for Broad Health Tracking	Dimensions: 1.59 × 1.59 × 0.49 in	GPS: Built-in GPS and GLONASS	Health features: ECG, heart rate, SpO2, skin-temperature trends, stress, and sleep tracking	VIEW ON AMAZON	See Our Full Breakdown
Fitbit Sense 2 Health and Fitness Smartwatch, Blue Mist/Pale Gold		Best for Stress and Sleep Tracking	Color: Blue Mist/Pale Gold	GPS: Built-in	Exercise modes: More than 40	VIEW ON AMAZON	See Our Full Breakdown
Samsung Galaxy Watch 4 Classic 46mm Smartwatch with ECG and Fitness Tracking (Renewed)		Best for Classic Watch Controls	Case size: 46mm	Case material: Stainless steel	Health monitoring: ECG, heart rate, and blood oxygen	VIEW ON AMAZON	See Our Full Breakdown
Fitbit Sense 2 Health and Fitness Smartwatch, Lunar White/Platinum		Best for Health Tracking and Longer Battery Life	Color: Lunar White/Platinum	ECG and rhythm features: ECG app and irregular heart-rhythm notifications	Other health features: Stress monitoring, SpO2, and heart-rate tracking	VIEW ON AMAZON	See Our Full Breakdown
Apple Watch Series 11 GPS 42mm with Rose Gold Aluminum Case and Light Blush Sport Band (S/M)		Best Compact iPhone Pick	Model: Apple Watch Series 11 GPS	Case size: 42mm	Case and band: Rose gold aluminum case; Light Blush Sport Band, S/M	VIEW ON AMAZON	See Our Full Breakdown
Apple Watch Series 11 GPS Smartwatch, 46mm Jet Black Aluminum Case with Black Sport Band (M/L)		Best for a Larger Apple Watch Display	Model: Apple Watch Series 11 GPS	Case size: 46mm	Case and band: Jet Black aluminum case; Black Sport Band, M/L	VIEW ON AMAZON	See Our Full Breakdown

More Details on Our Top Picks

1. Garmin Venu 4 45mm GPS Smartwatch with Bright Display and Health Monitoring

   

   Best for Battery Life

   View on Amazon

   For ECG-minded buyers who also want fewer charging interruptions, the Garmin Venu 4 stands out with up to 12 days of battery life, a bright AMOLED screen, and broad health and fitness tracking. Its ECG app is region-dependent, though, so I would verify local availability before choosing it specifically for ECG. Compared with the Apple Watch Series 11, Garmin lasts much longer between charges, but the Apple offers ECG without the same regional caveat in its supported markets and has a more developed iPhone-focused smart experience. The Venu 4 is better suited to people who value training tools, sleep and stress insights, and endurance over frequent app interactions. Its 45mm case may feel large on smaller wrists, and some smart features depend on a compatible phone.

   Pros:

   • Up to 12 days of stated battery life reduces charging frequency.
   • AMOLED display makes workout and health information easy to read.
   • Tracks sleep, stress, SpO2, heart rate, and Body Battery.
   • More than 80 sports modes support varied training routines.

   Cons:

   • ECG availability depends on region, limiting its appeal as a dedicated ECG choice.
   • The 45mm case may be bulky on smaller wrists.
   • Full smart features require a compatible smartphone.

   Best for: Fitness-focused buyers who want long battery life and can confirm that Garmin’s ECG app is available in their region.

   Not ideal for: People choosing a watch primarily for dependable ECG availability or those with smaller wrists who prefer a compact case.

   • Case size:45 x 45 x 12.5 mm
   • Wrist circumference:135–200 mm
   • Display:AMOLED
   • Battery life:Up to 12 days
   • Sports modes:Over 80 indoor and GPS sports modes
   • Health features:Heart rate, SpO2, sleep score, stress tracking, Body Battery, and fitness age
   • Connectivity:Smartphone notifications, Garmin Pay, and voice responses
   • ECG:ECG app availability is region-dependent
   Our verdict

   “Choose the Venu 4 if long battery life and training insights matter more to you than guaranteed ECG availability.”

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2. Apple Watch Series 11 GPS 46mm Smartwatch with Rose Gold Aluminum Case and Light Blush Sport Band

   

   Best Overall for iPhone ECG Users

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   The Apple Watch Series 11 is the strongest fit here for iPhone owners who want ECG alongside everyday health and fitness tools. Its 46mm always-on display gives readings, alerts, and workout details room to breathe, while 50-meter water resistance and IP6X dust resistance suit an active daily routine. Compared with the 42mm Series 11 in this list, this version offers a larger viewing area but takes up more wrist space. The tradeoff shared by both Apple models is battery life: up to 24 hours means regular charging, although a 15-minute charge is stated to provide eight hours of use. It requires an iPhone for full functionality, so Android users should choose another option, such as the Fitbit Sense 2 or Samsung Galaxy Watch 4.

   Pros:

   • ECG is included among its health features.
   • Large 46mm display provides more room for information and controls.
   • 50-meter water resistance and IP6X dust resistance support active use.
   • Fast charging is stated to provide eight hours of use from 15 minutes.

   Cons:

   • Up to 24 hours of battery life calls for frequent charging.
   • Full functionality requires an iPhone.
   • The 46mm size may not suit buyers who prefer a compact watch.

   Best for: iPhone owners who want ECG, a larger watch display, and health and fitness features in a water-resistant everyday smartwatch.

   Not ideal for: Android users, or buyers who want multi-day battery life or a smaller, less prominent watch.

   • Model:Apple Watch Series 11
   • Case size:46mm
   • Connectivity:GPS
   • Case material:Rose Gold Aluminum
   • Band:Light Blush Sport Band
   • Water resistance:50m
   • Dust resistance:IP6X
   • Battery and charging:Up to 24 hours; 15 minutes of fast charging provides up to 8 hours of use
   Our verdict

   “Pick this Series 11 if you use an iPhone and want an ECG-capable watch with a larger screen, accepting daily charging.”

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3. Apple Watch Series 11 GPS 42mm Smartwatch with Jet Black Aluminum Case and Black Sport Band – S/M

   

   Best Compact ECG Watch for iPhone

   View on Amazon

   This 42mm Apple Watch Series 11 brings ECG and the Series 11 health and safety feature set to a smaller case than the 46mm model in this roundup. That makes it the more suitable Apple pick for buyers who want a less prominent watch, while retaining 50-meter water resistance, IP6X dust resistance, and fast charging. Its ECG capability and iPhone integration make it a more direct choice for Apple users than the Garmin Venu 4, whose ECG app is region-dependent. The compromise is not smaller-model battery endurance: the stated maximum remains up to 24 hours, so regular charging is still part of ownership. Buyers who want several days between charges may prefer the Fitbit Sense 2, while Android users should skip this Apple model.

   Pros:

   • 42mm case offers a more compact option than the 46mm Series 11.
   • Includes ECG, heart rate alerts, and sleep monitoring.
   • Fall detection and emergency assistance add safety tools.
   • Water resistance and dust resistance support everyday activity.

   Cons:

   • Up to 24 hours of battery life requires frequent charging.
   • Full functionality depends on an iPhone.
   • Smaller display provides less viewing area than the 46mm Apple Watch Series 11.

   Best for: iPhone owners with smaller wrists who want ECG, activity tracking, and safety features in a 42mm case.

   Not ideal for: Android users or anyone who prioritizes multi-day battery life over a compact Apple smartwatch.

   • Model:Apple Watch Series 11
   • Case size:42mm
   • Connectivity:GPS
   • Case material:Jet Black Aluminum
   • Band:Black Sport Band, S/M
   • Water resistance:50m
   • Dust resistance:IP6X
   • Battery and charging:Up to 24 hours; 15 minutes of fast charging provides up to 8 hours of use
   Our verdict

   “Choose this 42mm Series 11 if you want Apple’s ECG and safety features in a smaller case and can charge it daily.”

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4. Fitbit Sense 2 Health and Fitness Smartwatch – Shadow Grey/Graphite

   

   Best for Stress and Recovery Tracking

   View on Amazon

   The Fitbit Sense 2 pairs ECG capability with a strong focus on stress, sleep, and daily activity, making it a distinct alternative to the Apple Watch Series 11. Its stated 6+ days of battery life is a practical advantage over Apple’s up-to-24-hour estimate, while built-in GPS means outdoor tracking does not depend on carrying a phone. The watch also offers more than 40 exercise modes and 50-meter water resistance. Buyers should check which health features require a premium subscription, since access may affect the value of its tracking tools. On-wrist calls and notifications can also shorten battery life. Compared with the Garmin Venu 4, the Sense 2 has a shorter stated battery life, but its ECG capability is not described as region-dependent in the supplied product details.

   Pros:

   • ECG capability sits alongside SpO2 and stress tracking.
   • Stated battery life exceeds six days.
   • Built-in GPS supports outdoor activity tracking without a phone.
   • 50-meter water resistance suits swimming and everyday water exposure.

   Cons:

   • Some health features may require a premium subscription.
   • Calls and notifications can reduce battery life.
   • Its smart feature set and app experience differ from the iPhone-centered Apple Watch.

   Best for: People who want ECG alongside stress and sleep tracking, built-in GPS, and less frequent charging than an Apple Watch typically allows.

   Not ideal for: Buyers who want every health feature without subscription requirements, or who need heavy call and notification use without added battery drain.

   • Color:Shadow Grey/Graphite
   • Battery life:6+ days
   • Water resistance:50 meters
   • GPS:Built-in
   • Exercise modes:40+
   • Connectivity:Bluetooth
   • Smart features:Amazon Alexa, Google Wallet, and Google Maps
   • Health features:ECG, SpO2, stress management, and sleep tracking
   Our verdict

   “Pick the Sense 2 if stress and sleep tracking, ECG, and multi-day battery life matter more than a full Apple-style smart experience.”

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5. Samsung Galaxy Watch 4 40mm Bluetooth Smartwatch with ECG, GPS, and Fall Detection – US Version, Black

   

   Best for Samsung Health Metrics

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   The Samsung Galaxy Watch 4 offers more than ECG: its sensors also cover SpO2 and body composition, while workout tools include auto detection and VO₂ max tracking. That mix suits Samsung phone owners who want fitness metrics alongside heart monitoring. Compared with the Fitbit Sense 2, the Galaxy Watch 4 adds body composition analysis and the listed LTE connectivity, but its ECG and other health functions can depend on a compatible Samsung phone and specific app versions. The product title identifies this as a Bluetooth model, while the supplied description also lists LTE; buyers should confirm the exact connectivity configuration before relying on phone-free service. Its range of features may feel busy for casual users, and the 40mm case offers less screen space than the 46mm Apple Watch Series 11.

   Pros:

   • Combines ECG with SpO2 and body composition sensors.
   • Auto workout tracking and VO₂ max features serve active users.
   • GPS is listed for location-based activity tracking.
   • Fall detection is included in the product title.

   Cons:

   • Some health features require a compatible Samsung phone and specific app versions.
   • The feature set may overwhelm people who want straightforward health tracking.
   • The Bluetooth title and LTE connectivity description leave the exact connection configuration unclear.

   Best for: Samsung phone owners who want ECG alongside body composition, running metrics, GPS, and workout auto detection.

   Not ideal for: Casual users seeking a simple ECG watch, or buyers who need health features to work without Samsung phone and app compatibility.

   • Display size:40mm
   • Model:SM-R860NZKAXAA
   • Connectivity:Bluetooth, LTE, and GPS listed in product data; title identifies the model as Bluetooth
   • Health sensors:ECG, heart rate monitor, SpO2, and body composition (BIA)
   • Fitness features:Auto workout tracking, VO₂ max, advanced run coaching, and group challenges
   • Safety feature:Fall detection
   • Phone compatibility:Some health features require a compatible Samsung phone and specific app versions
   Our verdict

   “Choose the Galaxy Watch 4 if you use a compatible Samsung phone and want ECG plus a broad set of body and fitness metrics.”

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6. Withings ScanWatch 2 Hybrid Smartwatch

   

   Best for Long Battery Life

   View on Amazon

   The Withings ScanWatch 2 is the clearest fit for buyers who want ECG tracking without a screen-forward smartwatch look. Its analog hands, stainless steel case, and sapphire glass give it a more traditional feel than the Apple Watch Series 11, while its up to 35-day battery life means fewer charging interruptions. It records a 30-second ECG and tracks heart rate, sleep, and more than 40 sports, so it covers more than just heart checks. The tradeoff is a smaller digital interface and less smartwatch-style convenience than Apple’s feature-rich display. ECG and AFib detection also require the Withings ECG App, and some personalized insights are tied to a one-month Withings+ offer. I’d choose it for long battery life and a classic watch design, not for app-heavy interaction.

   Pros:

   • Up to 35 days of battery life reduces charging frequency
   • Analog hands pair with a digital health-tracking display
   • Tracks 30-second ECG, heart rate, sleep, and more than 40 sports
   • Stainless steel case and sapphire glass

   Cons:

   • ECG and AFib detection require the Withings ECG App
   • Some personalized insights are tied to a one-month Withings+ offer
   • Hybrid display is less suited to touchscreen-heavy smartwatch use

   Best for: Buyers who want ECG and everyday health tracking in a classic-looking watch and prefer charging far less often.

   Not ideal for: People who want a large touchscreen, extensive on-wrist app interaction, or ECG access without a companion app.

   • Case:Stainless steel
   • Glass:Sapphire
   • Battery life:Up to 35 days
   • ECG:30-second ECG; ECG and AFib detection require the Withings ECG App
   • Heart monitoring:Continuous heart rate tracking; high and low heart rate notifications
   • Activity tracking:More than 40 sports, VO₂ max, and heart rate zones
   • Sleep tracking:Sleep stages and breathing
   • Compatibility:Android and iOS
   Our verdict

   “Choose the ScanWatch 2 if you want ECG features, a traditional watch appearance, and long battery life more than a large app-driven display.”

   → See it on Amazon →

7. Apple Watch Series 11 GPS 42mm Smartwatch with Space Gray Aluminum Case and Black Sport Band

   

   Best for iPhone Owners

   View on Amazon

   For iPhone owners who want ECG alongside a broad set of smartwatch tools, the Apple Watch Series 11 is the most integrated choice in this group. Its 42mm touchscreen and safety, health, and sleep features make it more interactive than the hybrid Withings ScanWatch 2, while 50-meter water resistance supports swimming and other water activities. The compact case may suit buyers who find larger watches unwieldy, and fast charging can add up to eight hours of use in 15 minutes. The main compromise is routine charging: its battery lasts up to 24 hours, far short of Withings’ stated 35 days or the Fitbit models’ six-plus days. Full functionality also depends on an iPhone, so Android users should skip it. This is a strong ECG-centered pick only if you value Apple’s connected experience as much as health tracking.

   Pros:

   • Combines health and sleep tracking with safety alerts and fitness metrics
   • 50-meter water resistance supports water activities
   • Fast charging provides up to eight hours of use after 15 minutes
   • 42mm size offers a more compact option than larger watches

   Cons:

   • Up to 24 hours of battery life calls for frequent charging
   • Full functionality requires an iPhone
   • Its touchscreen-first design offers less traditional styling than the Withings ScanWatch 2

   Best for: iPhone owners who want ECG and health tracking in a compact, water-resistant smartwatch with connected safety features.

   Not ideal for: Android users or anyone who wants multi-day battery life without frequent charging.

   • Model:Apple Watch Series 11
   • Size:42mm
   • Connectivity:GPS
   • Case:Space Gray aluminum
   • Band:Black Sport Band
   • Water resistance:50m
   • Dust resistance:IP6X
   • Battery and charging:Up to 24 hours; 15 minutes of fast charging provides up to 8 hours of use
   Our verdict

   “Pick this Series 11 if you use an iPhone and want ECG in a compact smartwatch, but look elsewhere if battery life is your priority.”

   → See it on Amazon →

8. Samsung Galaxy Watch 8 (2025) 40mm Bluetooth Smartwatch – Graphite

   

   Best for Samsung Health Features

   View on Amazon

   The Galaxy Watch 8 suits Android users drawn to health and exercise tools in a lightweight 40mm design. Its sleep tracking, heart rate monitoring, blood pressure feature, and Running Coach give it a broader coaching angle than the ECG-focused Withings ScanWatch 2. It also adds a personal AI assistant, which favors buyers who want help and information from the wrist. But this is not the easiest pick if ECG is the deciding feature: the supplied product details do not list ECG, so I wouldn’t choose it as a confirmed ECG option in this roundup. Blood pressure monitoring requires a separate cuff, and the watch works best with Samsung phones while relying on Samsung Health for its full feature set. The battery is described only as improved and long-lasting, without a specific runtime. Choose it for Samsung-oriented health tools, not for clearly specified ECG capability.

   Pros:

   • Lightweight 40mm design is suited to all-day wear
   • Includes sleep tracking, heart rate monitoring, and a Running Coach
   • Personal AI assistant adds hands-free help
   • Compatible with Samsung and other Android smartphones

   Cons:

   • Product details do not specify ECG, making it a poor choice for ECG-first shopping
   • Blood pressure monitoring requires a separate cuff
   • Works best with Samsung phones and uses Samsung Health for full functionality
   • Battery life is described without a specific runtime

   Best for: Android users, especially Samsung phone owners, who want a compact watch focused on sleep, running guidance, and health tools.

   Not ideal for: Buyers shopping specifically for a verified ECG feature, or those who need a stated battery runtime and do not want Samsung Health dependencies.

   • Size:40mm
   • Connectivity:Bluetooth
   • Compatibility:Samsung and other Android smartphones
   • Battery:Described as improved and long-lasting; specific runtime not provided
   • Health features:Sleep tracking, blood pressure monitoring, and heart rate monitoring
   • Exercise feature:Running Coach
   • AI assistant:Yes
   • Warranty:2 years
   Our verdict

   “Choose the Galaxy Watch 8 for Samsung-friendly health and running tools, but not if ECG is a non-negotiable feature.”

   → See it on Amazon →

9. Fitbit Sense Health and Fitness Smartwatch with GPS, Heart Rate, SpO2, ECG, Skin Temperature and Stress Tracking

   

   Best for Broad Health Tracking

   View on Amazon

   The original Fitbit Sense pairs ECG with a wide spread of health signals, including SpO2, skin-temperature trends, stress, and sleep tracking. That makes it a better match than the Apple Watch Series 11 for buyers who want a varied health dashboard and longer stretches between charges: Fitbit lists more than six days of battery life, compared with Apple’s up to 24 hours. Built-in GPS and GLONASS also let it track routes without relying on a connected phone. Its 50-meter water resistance and Bluetooth calling add everyday flexibility. The key drawback is provenance: this is an international version with no US warranty. Some functions also rely on the Fitbit app, an account, or a smartphone. I’d favor the newer Fitbit Sense 2 for its listed exercise modes and current feature set, but this Sense remains a fit for buyers who value its specific mix of ECG and health metrics.

   Pros:

   • ECG sits alongside SpO2, skin-temperature trends, stress, and sleep tracking
   • Built-in GPS and GLONASS can track routes without a phone
   • Battery life is listed at more than six days
   • 50-meter water resistance and Bluetooth calling add everyday utility

   Cons:

   • International version has no US warranty
   • Some features depend on the Fitbit app, an account, or a smartphone
   • Fitbit Sense 2 lists more than 40 exercise modes, a detail not provided for this model

   Best for: Health-focused buyers who want ECG, built-in GPS, and a wide range of health trends across iOS or Android.

   Not ideal for: US buyers who require a US warranty, or anyone who wants all smartwatch features to work without a paired phone, account, or Fitbit app.

   • Dimensions:1.59 × 1.59 × 0.49 in
   • GPS:Built-in GPS and GLONASS
   • Health features:ECG, heart rate, SpO2, skin-temperature trends, stress, and sleep tracking
   • Water resistance:Up to 50 meters
   • Battery life:Up to 6+ days
   • Compatibility:iOS 12.2 or later; Android 7.0 or later
   • Syncing range:Up to 30 ft
   • Model note:International version; no US warranty
   Our verdict

   “Choose the original Sense for ECG, built-in GPS, and varied health metrics if the international version’s lack of a US warranty is acceptable.”

   → See it on Amazon →

10. Fitbit Sense 2 Health and Fitness Smartwatch, Blue Mist/Pale Gold

    

    Best for Stress and Sleep Tracking

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    The Fitbit Sense 2 is the Fitbit pick for buyers who want ECG alongside stress and sleep tracking, rather than ECG as an isolated feature. It also includes built-in GPS, more than 40 exercise modes, SpO2 monitoring, and a battery life listed at over six days. Compared with the original Fitbit Sense, the Sense 2’s supplied details specifically call out exercise modes and irregular rhythm notifications, making it easier to match to a fitness routine as well as health monitoring. Yet feature access is not uniform: some health functions vary by location, and some require Fitbit Premium. Its 50-meter water resistance helps with water-based activity, but the product information does not specify a separate GPS connectivity mode or give a precise runtime beyond six-plus days. I’d pick it over the original Sense for its stated training options, while checking regional feature access first.

    Pros:

    • Combines ECG and irregular rhythm notifications with stress and sleep tracking
    • Built-in GPS supports route tracking
    • More than 40 exercise modes broaden activity options
    • Water resistant to 50 meters with battery life listed at over six days

    Cons:

    • Some health features are limited by location
    • Some features require a Fitbit Premium membership
    • Battery life is stated as over six days rather than a more precise runtime

    Best for: Buyers who want ECG, stress and sleep tracking, built-in GPS, and a broad set of exercise modes in one Fitbit watch.

    Not ideal for: People who need every health feature available in their region or want to avoid paid Fitbit Premium features.

    • Color:Blue Mist/Pale Gold
    • GPS:Built-in
    • Exercise modes:More than 40
    • Water resistance:50 meters
    • Battery life:6+ days
    • Health features:Stress detection, ECG app, irregular rhythm notifications, SpO2, and health metrics dashboard
    • Connectivity:Bluetooth calls and notifications
    • Apps and services:Amazon Alexa, Google Wallet, and Google Maps
    Our verdict

    “Choose the Sense 2 if Fitbit’s combination of ECG, stress and sleep tracking, and exercise modes suits your routine and its regional or subscription limits work for you.”

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11. Samsung Galaxy Watch 4 Classic 46mm Smartwatch with ECG and Fitness Tracking (Renewed)

    

    Best for Classic Watch Controls

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    The Galaxy Watch 4 Classic makes sense for Android users who want ECG monitoring in a watch with a more traditional, substantial feel. Its rotating bezel offers a tactile way to move through menus, unlike the touch-focused controls on the Apple Watch Series 11. ECG sits alongside heart-rate and blood-oxygen tracking, GPS, and fall detection, while Wear OS brings Google services and wrist notifications into the mix. The tradeoff is age and condition: this is a renewed 46mm model, so warranty coverage may be more limited than with a new watch, and its large stainless-steel case may not suit smaller wrists. Compared with the Fitbit Sense 2, it puts more emphasis on smartwatch navigation and Google integration, but its interface can take more effort to learn and feature-heavy use may mean more frequent charging.

    Pros:

    • ECG, heart-rate, and blood-oxygen monitoring in one watch
    • Rotating bezel provides tactile menu navigation
    • Wear OS supports Google services and wrist notifications
    • Stainless-steel case gives it a more traditional watch appearance

    Cons:

    • Renewed condition may come with limited warranty coverage
    • The 46mm stainless-steel case may feel large or heavy on smaller wrists
    • Feature-heavy use can shorten battery life, and the interface may take time to learn

    Best for: Android users who prefer a large stainless-steel watch, tactile bezel controls, and ECG alongside everyday smartwatch features.

    Not ideal for: Buyers who want a new device with predictable warranty coverage, a compact case, or a simple interface and extended battery life.

    • Case size:46mm
    • Case material:Stainless steel
    • Health monitoring:ECG, heart rate, and blood oxygen
    • Navigation:Rotating bezel
    • Location and safety:GPS and fall detection
    • Platform:Wear OS
    • Connectivity:Bluetooth
    • Condition:Renewed
    Our verdict

    “Choose this renewed Samsung if you want ECG and Google-connected smartwatch features in a large watch with physical bezel controls, and can accept the condition and battery tradeoffs.”

    → See it on Amazon →

12. Fitbit Sense 2 Health and Fitness Smartwatch, Lunar White/Platinum

    

    Best for Health Tracking and Longer Battery Life

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    The Fitbit Sense 2 is a strong fit for buyers who want ECG as part of a broader health routine rather than a watch centered on phone apps. It pairs the ECG app with heart-rate tracking, irregular-rhythm notifications, stress monitoring, sleep tools, and built-in GPS. Its battery is rated for more than six days, a clear contrast with the Apple Watch Series 11’s up-to-24-hour normal-use rating, so charging can be less frequent. The Sense 2 also offers 40-plus exercise modes and water resistance to 50 meters. Its limitations are practical: some health features depend on location, age, or device, and certain functions may need a nearby phone or Fitbit Premium. Compared with the Samsung Galaxy Watch 4 Classic, it favors wellness tracking and battery life over a tactile rotating bezel and Wear OS app experience.

    Pros:

    • ECG app plus irregular heart-rhythm notifications
    • Stress, sleep, heart-rate, and SpO2 tracking
    • Built-in GPS and more than 40 exercise modes
    • Battery rated for over six days and water resistance to 50 meters

    Cons:

    • Some health features vary by country, age, or device
    • Some functions require a nearby phone or Fitbit Premium membership
    • Less centered on app access and tactile smartwatch controls than the Samsung Galaxy Watch 4 Classic

    Best for: People who want ECG, stress and sleep tracking, built-in GPS, and less frequent charging in a wellness-focused watch.

    Not ideal for: Buyers who need every health feature available in their region, want a full smartwatch app experience, or do not want phone- or subscription-dependent features.

    • Color:Lunar White/Platinum
    • ECG and rhythm features:ECG app and irregular heart-rhythm notifications
    • Other health features:Stress monitoring, SpO2, and heart-rate tracking
    • GPS:Built-in
    • Exercise modes:40+
    • Water resistance:Up to 50 meters
    • Battery life:Rated for 6+ days
    • Connectivity and apps:Bluetooth calls and notifications, Amazon Alexa, Google Wallet, and Google Maps
    Our verdict

    “Pick the Sense 2 if health and fitness tracking with fewer charging interruptions matters more to you than a broad app experience.”

    → See it on Amazon →

13. Apple Watch Series 11 GPS 42mm with Rose Gold Aluminum Case and Light Blush Sport Band (S/M)

    

    Best Compact iPhone Pick

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    For an iPhone owner who wants ECG without a larger case, this 42mm Apple Watch Series 11 is the compact choice in this group. It combines ECG and heart-rate alerts with sleep tracking, Vitals tools, and possible sleep-apnea and hypertension notifications, plus fall and crash detection. The smaller case may be easier to wear through workouts and overnight sleep tracking than the 46mm Series 11, though buyers should choose by wrist fit and band sizing. Its always-on display and 50-meter water resistance support everyday use, while fast charging can add up to eight hours of normal-use battery life in 15 minutes. The major compromise is endurance: its rating is up to 24 hours, far below the Fitbit Sense 2’s 6+ days. It also requires an iPhone or Wi-Fi for connectivity.

    Pros:

    • ECG, heart-rate alerts, and a broad set of sleep and health features
    • Compact 42mm case with an always-on display
    • Fall and crash detection with emergency connection features
    • Fast charging and water resistance up to 50 meters

    Cons:

    • Requires an iPhone or Wi-Fi for connectivity
    • Up to 24 hours of normal-use battery life means frequent charging
    • Possible health notifications and safety features may depend on availability and setup

    Best for: iPhone users with smaller wrists who want ECG, safety alerts, and a compact watch for workouts and sleep tracking.

    Not ideal for: Android users, people who prefer a larger display, or anyone who wants several days of battery life between charges.

    • Model:Apple Watch Series 11 GPS
    • Case size:42mm
    • Case and band:Rose gold aluminum case; Light Blush Sport Band, S/M
    • Connectivity:GPS; works with iPhone or Wi-Fi
    • Display:Always-on
    • Health features:ECG, heart-rate alerts, sleep tracking, Vitals app, and possible sleep-apnea and hypertension notifications
    • Safety features:Fall detection, crash detection, and emergency connection features
    • Water resistance:Up to 50 meters
    • Battery and charging:Up to 24 hours of normal use; 15 minutes of charging for up to 8 hours of normal use
    Our verdict

    “Choose this 42mm Series 11 if you use an iPhone and want a smaller ECG watch, but skip it if long battery life is a priority.”

    → See it on Amazon →

14. Apple Watch Series 11 GPS Smartwatch, 46mm Jet Black Aluminum Case with Black Sport Band (M/L)

    

    Best for a Larger Apple Watch Display

    View on Amazon

    This 46mm Apple Watch Series 11 is the larger-screen alternative to the 42mm rose-gold Series 11 in this roundup. The bigger case gives buyers more display area for workout metrics and notifications, while keeping the same core ECG, heart-rate, sleep, and safety focus. Its always-on display, scratch-resistant glass, IP6X dust resistance, and water resistance up to 50 meters suit a watch worn through varied daily routines. Fast charging helps offset a battery rated for up to 24 hours of normal use, but it does not match the Fitbit Sense 2’s 6+ day rating. This GPS model is intended for people in Apple’s ecosystem; it is a poor match for Android users. Compared with the 42mm Series 11, the main reason to choose it is the larger case and M/L band, not a different ECG feature set.

    Pros:

    • ECG, heart-rate alerts, sleep scoring, and workout metrics
    • 46mm case offers a larger display than the 42mm Series 11 option
    • Fall and crash detection with emergency assistance features
    • Fast charging, scratch-resistant glass, IP6X dust resistance, and water resistance up to 50 meters

    Cons:

    • Requires an iPhone or Wi-Fi for connectivity
    • Battery is rated for up to 24 hours of normal use
    • The 46mm case may be too large for smaller wrists

    Best for: iPhone users who prefer a larger display and M/L band, and want ECG, workout tracking, and emergency safety features.

    Not ideal for: Buyers with smaller wrists, Android users, or anyone who prioritizes multi-day battery life over a larger screen.

    • Model:Apple Watch Series 11 GPS
    • Case size:46mm
    • Case and band:Jet Black aluminum case; Black Sport Band, M/L
    • Connectivity:GPS
    • Display:Always-on with scratch-resistant glass
    • Health features:ECG, heart-rate alerts, sleep scoring, and workout metrics
    • Safety features:Fall detection, crash detection, and emergency assistance
    • Durability:Water resistant up to 50 meters; IP6X dust resistance
    • Battery and charging:Up to 24 hours of normal use; 15 minutes of charging for up to 8 hours of normal use
    Our verdict

    “Choose this Series 11 over the 42mm version if you want a larger Apple Watch display and M/L band, and are comfortable charging daily.”

    → See it on Amazon →

How We Picked

I ranked these products around the reason someone searches for watches with ECG: whether the watch offers a clear, usable ECG feature, and whether it fits the buyer’s phone and everyday needs. I weighed the stated ECG capability, platform compatibility, ease of using health tools, design and wearability, and the role of additional tracking features. I also separated differences that affect function from cosmetic variations such as case color, band color, and band size.

The ranking favors options with a clearer ECG proposition and fewer buying ambiguities, then distinguishes them by who benefits most. Apple’s repeated Series 11 listings represent one model family rather than several distinct ECG choices. Fitbit Sense and Sense 2, the older Samsung Watch 4 models, the newer Watch 8, and the hybrid Withings each serve different priorities. Garmin Venu 4 ranks cautiously because the supplied product name does not confirm ECG; buyers should verify support for their region and exact model before treating it as an ECG pick.

Factors to Consider When Choosing Watches With Ecg

Choosing an ECG watch is less about collecting the longest list of health metrics and more about finding a device whose ECG feature works with your phone and fits how you’ll use it. These broader checks can help prevent a mismatch that a product name or feature list alone may not reveal.

Check ECG Availability Where You Live

An ECG feature can depend on both the watch model and the country where it is set up. Before choosing, check the manufacturer’s current regional support information rather than assuming that a feature advertised for one market will work everywhere. Some health functions may also require a compatible phone, software version, account, or companion app setup. This matters especially when buying an imported or older model, where the listing may not reflect local availability. If ECG is the main reason for buying, verify the exact model and region before weighing secondary features.

Match the Watch to Your Phone

Phone compatibility can narrow the shortlist more than case size or color. Apple Watch models are designed around an iPhone, while Samsung and Fitbit compatibility depends on the exact watch, phone, and feature set. Do not assume that a watch will deliver every health function simply because it can pair or show notifications on your phone. Check which app stores and operating systems are required, then confirm that ECG setup and data access are supported on your device. Buyers switching phone platforms later should also check whether their watch’s health records can be retained or transferred.

Understand What an ECG Can and Cannot Tell You

A wrist ECG is a short recording, not continuous heart monitoring and not a substitute for a clinician’s assessment. The feature may help capture a reading at a particular moment, but it does not diagnose every heart condition or replace urgent care when symptoms are serious. Read the manufacturer’s explanation of supported readings and limitations before relying on alerts or a normal result. Also check how the watch stores and exports readings if you plan to discuss them with a health professional. Buyers who expect a watch to detect every irregularity may be disappointed, regardless of brand.

Choose Between a Smartwatch and a Hybrid

A full touchscreen smartwatch usually offers richer apps, notifications, and on-wrist controls, while a hybrid watch gives more visual weight to a traditional dial and simpler interaction. Neither design is automatically better for ECG: the key is whether you are comfortable following the steps needed to record and review a reading. Consider how often you want to interact with the screen and whether you’ll wear the device overnight or during exercise. A larger display can make menus easier to read, but it may feel bulky on a smaller wrist. Try to prioritize everyday comfort, since a feature is of little use if the watch stays in a drawer.

Look Beyond ECG at Battery and Data Habits

Health tracking can create a routine of charging, syncing, and checking an app, and that routine differs across watch styles and platforms. Review manufacturer battery guidance for the settings you expect to use, since frequent screen use and continuous tracking can change real-world endurance. Think about whether you want one place for ECG readings, activity, stress, sleep, and notifications, or prefer a simpler health companion. Also check whether any features depend on a subscription or specific app service before purchase. A longer feature list is only useful when it fits the time and attention you want to give the device.

Treat Generations and Renewed Listings Separately

Similar product names can hide meaningful differences in age, software support, condition, and included accessories. The Galaxy Watch 4 and Watch 4 Classic are older entries than the listed Galaxy Watch 8, and a renewed Classic may have a different condition or warranty arrangement from a new watch. Compare the exact model number and support status rather than relying on the family name alone. For repeat listings of Apple Series 11 or Fitbit Sense 2, color and band configuration may be the main distinction, so choose fit and appearance rather than expecting different ECG functions. When buying an older generation, check how long the maker expects to provide updates and whether replacement bands or chargers are easy to obtain.

Frequently Asked Questions

Will an ECG watch work with any smartphone?

No. ECG setup and health data access can depend on the watch brand, phone operating system, companion app, and region. A watch may pair for basic notifications yet limit health features on an unsupported phone. Check the maker’s compatibility page for the exact phone and watch combination before buying. If you plan to change phones soon, factor that platform tie into your decision.

Can I use a watch ECG instead of seeing a doctor?

No. A watch ECG is a consumer health feature that records a limited reading and does not replace clinical evaluation or emergency care. A reading that appears normal cannot rule out every condition, and an alert is not a diagnosis. Follow the manufacturer’s guidance and discuss concerning readings or symptoms with a qualified health professional. Seek urgent care for severe or sudden symptoms rather than waiting for a watch reading.

Are the different Apple Watch Series 11 listings different ECG watches?

The listed Series 11 options differ by case size, case finish, band color, or band size; those details do not by themselves indicate different ECG capability. I’d choose between them based on wrist fit, comfort, and the band configuration you want. Confirm that the listed size and band range suit your wrist before ordering. Also check that you have a compatible iPhone and that ECG is supported in your region.

Should I choose a newer watch over an older model with ECG?

Not automatically, but generation affects more than ECG: software support, app compatibility, battery condition, and available features can differ. A newer model may make more sense if you want longer support or a more current platform, while an older watch may suit someone who only needs a basic ECG-capable device and confirms support remains active. Renewed products call for extra checks on condition, warranty, and included charging accessories. Compare the exact model and its current support status instead of treating all watches in one product family as equivalent.

Is a hybrid ECG watch a good choice if I want fewer notifications?

It can be, if you value a more traditional appearance and do not need a full app-focused smartwatch experience. A hybrid design may reduce the emphasis on touchscreen interaction, but you should still check how ECG readings are started, stored, and reviewed in its companion app. Compare those steps with a full smartwatch before deciding, especially if you want to share readings or use other health tools. Prioritize the interface you are likely to use consistently rather than assuming that a simpler-looking watch has simpler health setup.

Conclusion

For most iPhone owners, I’d choose the Apple Watch Series 11 as the best overall fit, selecting the case size and band that suit the wrist. The Fitbit Sense 2 is my value-oriented choice for buyers who want ECG alongside broader wellness tracking, while the Withings ScanWatch 2 is the premium-style pick for someone who prefers a hybrid watch rather than a full touchscreen. Beginners should start by checking phone compatibility and regional ECG support, then favor a familiar app and straightforward setup over extra metrics. Samsung users can compare the Galaxy Watch 8 with the older Watch 4 options based on current support and desired features; I’d choose a renewed Watch 4 Classic only after checking condition and warranty. I would not buy the Garmin Venu 4 specifically for ECG without confirming that the exact model and region support it.