7 Best Smartwatches with ECG: (2025 Guide & Reviews)

Last Updated on October 9, 2025 by Luis Cooper

Within only a few generations, smartwatches have gone from being simple fashion items to feature-rich fitness and health monitors.

The market is flooded with gadgets that use a variety of sensors to measure your everyday activities, exercise, sleep, and overall wellness as the importance of everyone’s long-term health increases. 

Additionally, these devices can call for assistance if the wearer falls and is unable to get up due to a hard fall or warn them of probable heart problems.

Some watches can track your ECG.

The best smartwatches with ECG tracking technologies are listed below.

Which are the Best Smartwatches with ECG?

Here are my recommended top 7 Best Smartwatches with ECG:-

Samsung Galaxy Watch 8: (Best Smartwatch with ECG Monitor)

If you’re shopping for the best smartwatches with ECG, the Samsung Galaxy Watch 8 is an easy pick for Android users who want clinical-style checks without losing everyday smarts.

It records a single-lead ECG for AFib screening, runs Irregular Heart Rhythm Notifications (IHRN) in the background, and lets you save/share a PDF report from the Samsung Health Monitor app—exactly what most clinicians prefer when you bring data to an appointment.

Setup is simple, but there’s one fine print that matters: ECG/IHRN requires a compatible Samsung Galaxy phone with the Samsung Health Monitor app and regional availability.

Why it Stands Out for ECG and Heart Health:

Samsung treats heart health as a system, not a one-off app.

Alongside ECG/IHRN, Watch 8 adds FDA-authorized sleep-apnea risk detection (US) that flags patterns consistent with moderate-to-severe OSA so you can talk to your doctor sooner.

You also get newer metrics like Vascular Load (cardiovascular strain trends), AGEs/Antioxidant Index updates, and Running Coach/Bedtime Guidance under One UI Watch.

In short, it’s a broad health toolkit with ECG at the center, not a box-tick feature.

The bright 3,000-nit display keeps waveforms readable outdoors, and dual-frequency GPS plus a faster processor make the whole experience feel snappy when you’re moving between workouts and health checks.

How ECG Works Here: (and the practical bits)

Open Samsung Health Monitor on the watch, sit still, rest your forearm on a table, and lightly touch the top button for 30 seconds.

You’ll see an on-watch rhythm classification (e.g., sinus rhythm vs. AFib), then the full trace syncs to the phone, where you can export a PDF to share.

For ongoing screening, enable IHRN—it quietly samples your pulse and prompts a spot ECG if it sees an irregular pattern.

Remember, this is single-lead screening: great for AFib checks, not a replacement for a 12-lead clinical ECG, and not designed to detect heart attacks.

Sleep Apnea and Broader Wellness:

Watch 8’s sleep-apnea risk feature is now rolling out widely after the US De Novo authorization, with Samsung noting approvals across major regions.

You’ll get a prompt in the Samsung Health Monitor app if your sleep patterns suggest risk, which is a useful, low-friction nudge to seek testing.

That sits next to better nightly staging, Bedtime Guidance, and stress alerts, so you get a coherent picture of recovery and strain—not just more charts.

Everyday use and Battery Reality:

In daily life, the Watch 8 is comfortable, bright, and quick. Battery life is typically about 1–2 days, depending on size, display settings, LTE/Wi-Fi use, and workouts—consistent with independent tests.

With ECG/IHRN active, plan your charging window (for example, after a morning shower), and you won’t think about it again.

ECG-focused Specs:

• ECG type: Single-lead spot check (30 s) with rhythm classification; IHRN background screening.

• Report sharing: PDF export via Samsung Health Monitor on the paired phone.

• Requirements: Galaxy Watch 8 + Samsung Galaxy phone; feature availability varies by country.

• Related health features: FDA-authorized sleep-apnea risk detection; Vascular Load, Running Coach, Bedtime Guidance.

• Hardware highlights for health use: 3,000-nit AMOLED, dual-frequency GPS, and a faster processor for a smooth UI.

Conclusion:

If you’re in Samsung’s ecosystem and want one of the best smartwatches with ECG that also tackles sleep-apnea risk and broader cardiovascular context, the Galaxy Watch 8 is a smart, well-balanced choice.

It pairs medical-style screening features with everyday usability in a way that’s easy to live with—make sure you’ve got a compatible Samsung phone to unlock everything.

Fitbit Sense 2: (Best Fitness Smartwatch with Manage Stress and ECG App)

It has all the functionalities that I was looking for.

It is no doubt the best watch with ECG, along with other everyday useful features. 

Features:

Comfort And Design:

The Sense 2 has a very premium appearance and feel.

It has a distinctly elegant appearance, especially when worn with the additional Brother Velles leather strap.

The Sense 2 comes in a variety of colors and materials for the optional bands, in addition to the graphite and soft gold aluminum colors that I tested.

The Sense 2 is very comfortable and light to wear, which pleased me.

Although I preferred the brother Velles leather strap, the infinite band that comes with the Sense 2 also feels wonderful, and I adore the inventive clasp technique.

Both the infinity straps that I tried and the leather strap were excellent. 

Battery Life:

Based on my experience of wearing the gadget, I think the Fitbit Sense 2 can last for more than six days on just a single charge.

It’s essentially what you would anticipate from the original Fitbit Sense, although take into consideration that it will change depending on how you utilize the gadget.

You can acquire a 24-hour supply of power in just 12 minutes of quick charging.

What Makes It Best:

The Sense 2’s touchscreen is incredibly responsive, with really no discernible lag or touch detection problems.

The external button’s functionality and menu navigation are both smooth and simple.

The screen is reliably awakened by motion sensing as well.

The Sense 2 is incredibly resilient in terms of toughness and water endurance.

It has a rated operating temperature range of -14 to 113 degrees Fahrenheit and is completely waterproof up to 164 feet undersea.

Additionally, when you experience stress, the device intends to keep a greater check on you.

You will have the standard Fitbit tools for monitoring your health and sleep, as well as a payment option and a device with a seven-day battery life.

Conclusion:

A full-featured Fitbit Sense 2 offers many features you want in a smart gadget.

Other notable benefits include its style and battery life.

Withings ScanWatch 2: (Best Hybrid Smartwatch)

If you want an ECG on a watch that still looks like a watch, the Withings ScanWatch 2 nails the brief.

It’s a hybrid: real hands, a tiny OLED window for prompts, and a battery that goes for weeks rather than days.

Under the classic face, you get a single-lead ECG for AFib checks, Irregular Rhythm Notifications, SpO₂, and 24/7 temperature variation via Withings.

TempTech 24/7 module—all tied into a calm Health Mate app that produces doctor-friendly ECG PDFs.

ECG and IHRN are cleared/approved in the US and widely across Europe, with Withings’ support pages listing exact regions so you’re not guessing about availability.

Why Does it Stand out for ECG:

ScanWatch 2 treats ECG like part of a broader cardiometabolic picture.

You can do a 30-second spot ECG on the wrist and export a PDF for a clinician, while IHRN quietly scans in the background and nudges you to confirm with an ECG if it spots irregularity.

In 2025, Withings also pushed a new ECG algorithm in the US that expands classifications beyond the older “sinus/AFib/inconclusive” trio, which makes the trace more informative when you do bring it to a visit.

Health Features that add Real Context:

Alongside ECG, you get SpO₂, HRV-based “Vitality”/readiness cues, sleep staging with REM, and temperature variation trends that help you spot illness onset or recovery dips.

Withings’ latest HealthSense updates use predictive algorithms across ~35 health metrics, focusing on early signals rather than just pretty charts.

If you prefer a watch that quietly captures health data and stays out of your way, this is the rare device that does it well.

Battery and Everyday Use:

The biggest practical win: multi-week battery.

Withings documents ~30–35 days on typical hybrid use (notifications on, workouts here and there), and that long window is exactly what you want for episodic conditions—you don’t miss events because your watch is sitting on a charger.

The case is stainless steel with sapphire glass, 5ATM water resistance, and the sub-display is just big enough to guide ECGs, start workouts, or show calls without turning the watch into a tiny phone.

How it Compares:

Versus full smartwatches, ScanWatch 2 feels distraction-free and far more sustainable to wear 24/7; you trade app stores and heavy animations for battery life and medical-style reporting.

Against other ECG watches, it wins on wear time and the hybrid design people actually want to keep on during meetings or sleep.

You’ll find fewer “smart” extras than an Apple/Samsung, but the core health capture + export is polished and the regional approvals are clearly documented.

Personal Take:

What surprised me most was compliance—I forgot about charging for weeks, which meant my ECG history and HRV trends actually looked complete.

The sub-dial prompts you through a recording without fuss, and the PDF export takes seconds.

I also liked how temperature variation and REM sleep context made the readiness nudges feel earned instead of generic.

ECG-focused Specs:

• ECG: 30-second single-lead; AFib screening; IHRN background checks; PDF export in app.

• Sensors: Optical HR/SpO₂, TempTech 24/7 (heat-flux + skin temp), accelerometer; HRV insights in app.

• Battery: Up to ~30–35 days typical hybrid use; fast charge in about 2 hours.

• Build: Stainless steel, sapphire glass, 5ATM water resistance; hybrid analog design.

• Approvals/availability: ECG FDA-cleared in the US; CE across the EU/UK; IHRN in many regions; see Withings’ feature-by-region page.

Conclusion:

For shoppers searching for the best smartwatches with ECG who value long wear time, clear medical-style exports, and a timeless look, the Withings ScanWatch 2 is a standout.

It quietly builds a richer health record—because it’s on your wrist when it matters.

Garmin Venu 4: Best Smartwatch for ECG and Heart Health)

If you want a modern AMOLED smartwatch that treats ECG as more than a checkbox,

The Garmin Venu 4 is finally there.

It brings on-wrist, 30-second single-lead ECG readings with Irregular Heart Rhythm Notifications (IHRN), lets you export a clinician-friendly PDF from Garmin Connect, and—crucially—ships with broader country support than earlier Garmin attempts.

Garmin has been expanding ECG availability across the EU, US, Canada, Australia, the UK, and more this year, and the Venu 4 sits squarely in that rollout.

Why it Stands Out:

Two things separate Venu 4 from typical “lifestyle” watches.

First, ECG is built into a full health stack: HR alerts, sleep apnea risk screening on eligible regions (via the broader Garmin ECG/IHRN and respiratory metrics push), Training Readiness style recovery cues, and Garmin’s new Lifestyle Logging in the app that tracks habits like caffeine, alcohol, and sunlight so you can see how they affect sleep, stress, and HRV over weeks—not just nights.

Second, Garmin pairs ECG with clear documentation and region lists, so you know whether it’s enabled before you buy or travel.

How ECG Works Here: (what you actually do)

Open the ECG app on the Venu 4, sit still, rest your forearm on a table, and touch the dedicated electrode (top button/bezel contact) for 30 seconds.

You’ll get an on-watch rhythm classification (e.g., sinus rhythm or possible AFib).

The trace syncs to Garmin Connect, where you can save a PDF and share it with your clinician.

As with every consumer watch, this is single-lead screening—not a 12-lead diagnostic—and it won’t detect a heart attack or structural issues.

If something looks wrong or you have symptoms, talk to a professional.

Everyday Experience: (hands-on style)

Coming from Venu 3, what I noticed right away was snappier menus and a brighter screen that still stayed readable outside.

The dual-frequency GPS felt solid for tempo runs, and HR tracking matched my chest strap closely on steady efforts.

Battery life depended on how hard I pushed the display and GPS, but with ECG/IHRN enabled and a few workouts, I was comfortably charging every several days—not nightly.

The surprise win was Lifestyle Logging—after two weeks of entries, it actually explained why certain late-evening coffees wrecked my HRV and sleep.

That context makes the ECG more useful, not just another chart.

ECG-focused Specs:

• ECG: 30-second single-lead; rhythm classification; IHRN background checks; PDF export.

• Display & build: AMOLED touchscreen, two-button layout; all-metal case; water-resistant for everyday training.

• GNSS: Dual-frequency GPS for tougher signal areas.

• Health suite: Advanced sleep analysis, recovery/readiness cues, Lifestyle Logging for habit impact.

• Platform: Full Garmin Connect ecosystem with long-term trend views and clinician-ready exports.

Conclusion:

If you’re searching for the best smartwatch with ECG and want Garmin’s training brains without giving up an AMOLED face and daily comfort, the Venu 4 finally checks every box.

ECG is reliable and easy to share, recovery tools are genuinely helpful, and the new habit tracking makes your heart data make sense in the real world.

Apple Watch Series 10: (Best Budget Smartwatch)

It records a 30-second, single-lead ECG on the wrist to screen for atrial fibrillation (AFib) and lets you export a PDF of the trace from the Health app—exactly what most clinicians ask for when you bring wearable data to an appointment.

In the background, Irregular Rhythm Notifications (IHRN) scan your pulse and nudge you to take an ECG if something looks off.

These features are FDA-cleared/authorized and widely available, with Apple maintaining region-by-region details.

Why it stands out for ECG and Heart Health:

What sets Series 10 apart is how ECG sits inside a larger, clinically minded toolkit.

Apple’s sleep-apnea notifications (FDA 510(k) cleared in 2024) flag patterns that suggest moderate-to-severe OSA, so you can seek testing sooner—useful context alongside ECG, high/low heart-rate alerts, and IHRN.

Apple’s documentation and newsroom updates outline the rollout across more than 150 countries/regions.

In short: ECG isn’t a checkbox here; it’s part of a coherent pathway that helps you spot issues and share clean reports with your doctor.

How the ECG Works: (and the limits)

Open the ECG app, rest your forearm on a table, and lightly touch the Digital Crown for 30 seconds.

The watch classifies the rhythm (e.g., sinus rhythm vs AFib), stores the waveform in the iPhone’s Health app, and lets you create a PDF in seconds.

Remember, this is a single-lead (lead I) screening, not a hospital 12-lead diagnostic; it won’t detect heart attacks or structural problems, and any concerning result should be discussed with a clinician.

Everyday Experience & Battery Reality:

Series 10 keeps Apple’s familiar “about a day” battery pattern in mixed use, with faster top-ups that make quick, reliable charging habits easy (handy if you track sleep).

Practical Tips: (what I advise readers to do)

• Enable IHRN so the watch can quietly screen in the background, and save your first ECG PDF to Files so you know where to find it before you ever need it.

• Charge at the same time daily (e.g., post-shower) so nightly sleep tracking and next-day ECGs are always available.

• Know the limits: if symptoms are severe or new (chest pain, fainting), seek medical care—wearables are for screening, not diagnosis.

Specs:

• ECG: 30-s single-lead (lead I) spot check; rhythm classification (AFib/sinus); PDF export via Health app.

• Background checks: Irregular Rhythm Notifications for passive screening.

• Related health features: Sleep-apnea notifications (FDA 510(k) cleared 2024; rolling out globally), high/low HR alerts.

• Compatibility: Requires iPhone for setup and Health app syncing; regional feature availability applies.

Conclusion:

As a package, Apple Watch Series 10 ties a trusted ECG workflow to broader heart- and sleep-risk screening in a way that’s easy to live with every day.

If you’re on iPhone and want the smoothest path from on-wrist ECG to doctor-ready PDF, this is the one to beat.

Google Pixel Watch 3: (Best for Android Users)

Why it Stands Out:

Pixel Watch 3 brings a reliable, single-lead ECG you can take anytime: open the Fitbit ECG app, rest a finger on the crown for 30 seconds, and get an AFib vs sinus-rhythm reading you can export as a PDF for your doctor.

It also runs Irregular Heart Rhythm Notifications in the background using the optical sensor, so you’ll be prompted to take an ECG if the watch sees something unusual.

New this year, Google added Loss of Pulse Detection (FDA-cleared in the U.S.), another safety layer alongside Fall Detection and Emergency SOS.

Hardware options now include 41mm and 45mm cases; the larger model brings a bigger battery and brighter display while keeping the same clean, domed design.

Daily Use & ECG Experience:

Setup is Simple:

If the Fitbit ECG app doesn’t appear in your list, update it once from the watch’s Play Store, and you’re good to go.

Readings save to the Fitbit app with a trace you can share. Remember this is a single-lead ECG—great for AFib screening, not a hospital-grade 12-lead.

In workouts and commutes, the 45mm model’s battery typically lasts longer than the 41mm model and charges faster than the previous generation; reviewers measured a noticeable improvement versus the Pixel Watch 2.

For GPS runs, note that Pixel Watch 3 uses single-band GPS (not dual-frequency); accuracy is fine for everyday training, though demanding runners may notice occasional quirks in tough signal areas.

Tracking adds SpO₂ trends and skin-temperature variation after longer nights.

How it Compares (ECG focus):

Versus Apple Watch 10, Pixel Watch 3 matches the on-wrist ECG and background rhythm checks, but Apple goes further with FDA-authorized sleep apnea notifications.

Samsung Galaxy Watch models also offer on-device ECG, yet they still require a Samsung phone for the Health Monitor app.

If you prefer a hybrid style, Withings ScanWatch 2 provides ECG plus proactive irregular-rhythm alerts and easy PDF exports.

Pixel Watch 3’s edge is tight Fitbit integration and the new Loss of Pulse Detection—useful if you want robust safety features on an Android-friendly watch.

ECG-Relevant Specs:

• ECG type: Single-lead (Lead I), 30-second spot checks; PDF export in the Fitbit app.

• Background screening: Irregular Heart Rhythm Notifications (PPG-based).

• Safety: Loss of Pulse Detection (FDA-cleared; rolling out in the U.S.).

• Sizes & battery: 41mm and 45mm; improved battery and faster charging vs gen 2.

• GPS: Single-band (no dual-frequency).

• Sleep sensors: SpO₂ trends and sleeping skin-temperature variation.

Who Will Like It:

Android users who want dependable ECG on the wrist, automated rhythm alerts, and a modern design—plus the extra peace of mind from Loss of Pulse Detection—without jumping into a different phone ecosystem.

If dual-band GPS or Apple’s sleep-apnea alerts are must-haves, consider those alternatives; otherwise,

Fitbit Charge 6: (Best Fitness Tracker)

Why it Stands Out:

Charge 6 brings Google’s latest heart-rate AI from the Pixel Watch line to a slim tracker, improving workout HR stability and reducing dropouts versus older bands.

You also get Google Maps turn-by-turn on the wrist, Google Wallet, and YouTube Music controls—useful quality-of-life features you won’t find on most “fitness bands.”

For gym sessions, a standout is Bluetooth heart-rate broadcast to machines and apps (Peloton, Concept2, Zwift, etc.), so the number you see on the treadmill matches what’s on your wrist.

In short: real ECG + practical tools in a device you’ll actually keep on 24/7.

ECG on Charge 6: what you actually do (and the limits)

Open the ECG tile in the Fitbit app, sit still, and lightly touch the case for 30 seconds.

The result (e.g., sinus rhythm or AFib) saves to your Fitbit history, and you can export a PDF for your clinician right from the app.

Remember, like every wearable ECG, this is single-lead screening, not a 12-lead clinical test; it won’t detect heart attacks or structural problems, and any concerning symptom warrants medical care.

Region support is expanding, but always check Fitbit’s feature-by-country list; a few users have reported app/PDF glitches that are typically fixed by updating the ECG module and Fitbit app.

Real-World Use:

For runs and intervals, the newer HR algorithm is noticeably steadier than older Fitbits, especially when the band is snug and a finger’s width above the wrist bone.

Built-in GPS handles route logs fine for everyday training, and the side button makes mid-workout controls simpler than on the Charge 5.

If you’re a lifter or class-goer, HR broadcast is the unsung hero—you can feed your heart rate to the bike/rower and still capture everything in Fitbit.

Battery life remains multi-day in mixed use, so you’re not choosing between sleep tracking and daytime ECG access.

Specs:

• ECG: 30-s single-lead, AFib/sinus classification; PDF export in the Fitbit app.

• Background checks: Irregular Heart Rhythm Notifications (FDA-cleared PPG algorithm).

• HR engine: New AI-led algorithm for improved accuracy during exercise.

• Smart extras: Google Maps turn-by-turn, Google Wallet, YouTube Music controls.

• Gym connectivity: Bluetooth HR broadcast to equipment/apps.

Conclusion:

If you want reliable ECG and rhythm alerts in the smallest package that still feels modern, the Fitbit Charge 6 is hard to beat.

It blends medical-style ECG reporting with Google conveniences and gym-friendly HR broadcast—and it does it without the bulk or constant charging of a full smartwatch.

Ending Paragraph:

Do you guys have experience with the best smartwatches with ECG?

What are your thoughts on them?

Is there any smartwatch you love to give that I didn’t mention in this article?

Would you please leave your comments below?

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