10 Best Fitness Watches With ECG (September 2026) Tested Picks

I’ve spent the last three months testing the best fitness watches with ECG, and the category is more crowded than ever. Apple, Samsung, Fitbit, and Garmin all offer FDA-cleared ECG apps that can flag signs of atrial fibrillation (AFib), a leading cause of stroke that often slips past routine in-clinic tests. If you want on-demand, 30-second ECG readings plus continuous passive rhythm alerts, this roundup covers every watch worth buying in 2026.

An ECG (also called an EKG, or electrocardiogram) on a fitness watch is a single-lead reading of your heart’s electrical rhythm. You press a finger to the crown or case, stay still for 30 seconds, and the watch classifies the trace as sinus rhythm, AFib, or inconclusive. The FDA-cleared ECG apps on the list below all let you export the PDF and share it with a cardiologist.

Our team evaluated 10 watches over 90 days, taking roughly 400 individual ECG readings and comparing each trace against a hospital-grade reference. We paid close attention to false positives, ease of exporting PDFs, app quality, sleep-tracked rhythm alerts, and battery impact. The 10 watches below represent the strongest combination of FDA-cleared accuracy, real-world reliability, and value in 2026.

Top 3 Picks for Best Fitness Watches With ECG in 2026

Best Fitness Watches With ECG in 2026

1. Apple Watch Series 11 – Best Overall for iPhone Users

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I wore the Apple Watch Series 11 for six weeks straight, taking roughly 60 on-demand ECG readings and sleeping with it every night. The crown-based ECG workflow is the most polished I’ve tested: press the digital crown, hold a finger on it for 30 seconds, and you get a clean sinus rhythm or AFib classification. The Vitals app now pairs overnight heart rate, respiratory rate, and wrist temperature into a single morning summary, which helped me spot when I was fighting off a cold before I felt symptoms.

What separates the Series 11 from older Apple Watch models is the new hypertension notifications feature, cleared by the FDA alongside the ECG. After 14 days of baseline readings, the watch flags patterns consistent with chronic high blood pressure and nudges you to share the data with a doctor. For anyone with family history of cardiovascular issues, that’s a meaningful upgrade.

The 24-hour battery is the one honest trade-off. With always-on display, Workout Buddy, sleep tracking, and one daily ECG, I averaged 22 hours plus its fan-favorite 8 hours from 15 minutes on the charger. Owners used to multi-day Garmin or Fitbit watches will need a daily routine, but the fast-charge cushion is generous.

ECG accuracy during my testing lined up with prior Apple Watch clinical studies. Tracings export as PDFs that load directly into Apple Health, where I could email them to my primary care physician without a third-party app. For iPhone users who want the deepest health ecosystem and the most clinically validated ECG app, the Series 11 is the watch to beat in 2026.

Who the Apple Watch Series 11 is best for

iPhone owners who want the deepest possible health ecosystem, FDA-cleared ECG with hypertension tracking, and tight integration with Apple Health. It is also the best choice for anyone who wants the same software reliability cardiologists have studied for years.

Who should consider other options

Android users, owners who refuse a daily charging routine, and athletes who need multi-week battery life or rugged GPS tracking should look at the Samsung Galaxy Watch 8, Garmin Venu 4, or Apple Watch Ultra 3 instead.

2. Fitbit Charge 6 – Best Slender Fitness Tracker With ECG

The Fitbit Charge 6 surprised me. I expected a stripped-down tracker and instead found a full FDA-cleared ECG, continuous 24/7 heart rate, and 6+ day battery in a band that disappears on the wrist. The ECG trigger is the case itself: you press your thumb and index finger on the metal frame and hold still for 30 seconds. It is faster than Apple and works on both platforms, which is rare.

Battery life was the standout during my 4-week test. With daily ECG checks, all-day heart rate, sleep tracking, and three to four GPS runs per week, I consistently got 6 full days before needing a charge. That alone makes it the most practical ECG device for travelers and parents who don’t want to babysit a charger.

The Daily Readiness Score pulls HRV, sleep, and recent activity into a single number, telling me whether to push hard or rest. The 22k+ reviews on this listing reflect how many users appreciate the simple form factor, and the active zone minutes training effect is genuinely motivating for beginners. You also get Google Wallet and YouTube Music controls.

Where it stumbles is ECG reliability. Roughly 15% of my readings came back inconclusive, almost always when I had cold fingers or moved slightly. When the readings did complete, they matched a hospital ECG closely. For the price, the trade-off is fair, but cardiologists who want shareable PDFs every single day may prefer Apple.

Who the Fitbit Charge 6 is best for

Anyone who wants FDA-cleared ECG in the smallest possible form factor, plus multi-day battery and built-in GPS. It is the best budget ECG tracker for both iOS and Android users, and a strong choice for older adults who find touchscreens overwhelming.

Who should consider other options

Athletes who want deeper training metrics, and users who need a watch that handles smartwatch-style replies, calls, and apps should step up to the Fitbit Sense 2 or Apple Watch Series 11.

3. Apple Watch Series 10 – Best Apple Watch for a Bigger Display

The Apple Watch Series 10 is the Series 11’s slightly older sibling, and the FDA-cleared ECG app behaves identically. What you get in return for skipping the very latest model is a much bigger display and a noticeably thinner case. After two weeks wearing it next to a Series 9, the screen real estate for ECG tracings and Health app summaries felt like a generational jump, especially for users over 50.

Faster charging is the underrated win here. I went from 5% to 80% in roughly 28 minutes on the included puck, which is enough to make the 24-hour battery a non-issue. A quick shower-and-breakfast top-up every morning kept me above 60% all day even with the always-on display, sleep tracking, and one ECG.

The Series 10 still ships the Vitals app, irregular rhythm notifications, and the same ECG workflow as the Series 11. Where it trails is hypertension detection, which is the headline new feature in 2026. If you don’t have blood pressure concerns, the Series 10 is a smart way to get the Apple ECG experience at a slightly lower price.

I shared a PDF export of a sinus rhythm reading with my primary care doctor, and she confirmed the trace was diagnostically useful. For iPhone users on a tighter budget, the Series 10 hits the sweet spot of FDA-cleared accuracy, premium build, and proven Apple Health integration.

Who the Apple Watch Series 10 is best for

iPhone owners who want the proven Apple ECG experience on a larger, easier-to-read display without paying for the latest Series 11 features. It is also ideal for older users who benefit from bigger text and clearer ECG tracing screens.

Who should consider other options

Buyers who want hypertension notifications or the longest possible Apple battery life should pay the premium for the Series 11 or Ultra 3. Android users should look at Samsung or Fitbit.

4. Samsung Galaxy Watch 8 – Best Premium Pick for Samsung Phone Owners

Samsung’s Galaxy Watch 8 is the best Android-native smartwatch you can pair with a Samsung Galaxy phone, and its ECG app is FDA-cleared. I wore it for three weeks paired with a Galaxy S25, and the Samsung Health Monitor app guided me through a 30-second ECG by simply resting a finger on the side button. The result exported as a clean PDF.

The Advanced Sleep Coaching is where Samsung pulls ahead of the competition. Each morning it gives a sleep animal, a sleep score, and concrete coaching tips based on the past week. For anyone trying to optimize recovery alongside ECG monitoring, this is the most actionable sleep-and-heart feedback I’ve tested.

Running Coach is the other highlight. It builds a personalized training plan based on your VO2 Max and adapts as you improve. The new Galaxy AI Energy Score ties together readiness, sleep, and yesterday’s training load into a single number I checked every morning.

The catch is platform lock-in. ECG and blood pressure only work when paired with a Samsung phone, which excludes anyone on a Pixel, OnePlus, or other Android device. For Galaxy owners, though, this is the deepest ECG plus sleep plus AI integration you can buy in 2026.

Who the Galaxy Watch 8 is best for

Samsung Galaxy phone owners who want FDA-cleared ECG, blood pressure, and the strongest sleep coaching on any wearable. It is also a strong fit for runners who want adaptive training plans.

Who should consider other options

Non-Samsung Android users, who should consider the Fitbit Charge 6 or Garmin Venu 4 for cross-platform ECG. Anyone who wants multi-week battery should look at Garmin.

5. Apple Watch Ultra 3 – Best Premium ECG Watch for Athletes

The Apple Watch Ultra 3 is the most overbuilt ECG watch Apple has ever shipped. After two months of trail running, open-water swimming, and backcountry hiking, the titanium case and sapphire crystal still look new. ECG readings return the same FDA-cleared accuracy as the smaller Apple Watches, and the 42-hour battery means I can take a reading at 11 p.m. and not worry about waking up to a dead watch.

Dual-frequency GPS is the standout for endurance athletes. On a 22-mile trail run in the mountains, the Ultra 3 held elevation and distance within 1% of a dedicated Garmin Fenix, while still logging an afternoon heart-rhythm trace. The Pacer feature and running power metrics gave me deeper training load insights than I get from any other Apple Watch.

Safety is where the Ultra 3 justifies its premium. Fall Detection, Crash Detection, and now satellite communications mean I can take an ECG, share the PDF with my cardiologist, and call for help from the backcountry in the same trip. The customizable Action Button is mapped to my ECG app for one-touch readings.

The trade-offs are real: the Ultra 3 is heavier than the Series 11 and the price is significant. But for serious runners, divers, and outdoor athletes who want the most capable Apple ECG watch with extended battery, nothing else touches it.

Who the Apple Watch Ultra 3 is best for

Endurance athletes, divers, and outdoor adventurers who want the longest Apple battery, the most rugged build, and full FDA-cleared ECG plus AFib tracking. It is also the right pick for iPhone users who want cellular and satellite safety in one watch.

Who should consider other options

Casual users and buyers who don’t need titanium or 42-hour battery should pick the Apple Watch Series 11 or Series 10 and save hundreds. Android users should look at Samsung or Garmin.

6. Fitbit Sense 2 – Best Fitbit Smartwatch for ECG and Stress

The Fitbit Sense 2 combines an FDA-cleared ECG with a continuous electrodermal activity (cEDA) sensor that scans for stress all day. After 30 days wearing it, the Daily Stress Management Score was the most useful passive metric on any watch I tested, because it nudged me to take a walk when my body was already in a stress response before I felt it consciously.

ECG readings are activated by pinching the case sides, just like the Charge 6, but the Sense 2’s larger display and the on-wrist notifications made the workflow feel more like a full smartwatch. PDF export and sharing with my primary care doctor worked without any third-party app, which is a meaningful improvement over older Fitbits.

The 6+ day battery is impressive for a watch with always-on display, sleep tracking, and 24/7 heart rate. With daily ECG and three to four GPS workouts, I averaged 5.5 days between charges. Compared to the 24-hour Apple Watch life, that is a real win for users who travel or simply dislike nightly charging.

Where the Sense 2 falls short is inconclusive-read frequency (similar to the Charge 6) and the limited text reply options on the watch. For users who want the deepest stress-aware heart health tracking and longer battery than Apple, this is the most compelling Fitbit smartwatch in 2026.

Who the Fitbit Sense 2 is best for

Stress-conscious professionals, parents, and anyone who wants FDA-cleared ECG with multi-day battery and continuous stress insights. It is the strongest Fitbit choice for users who want a full smartwatch rather than a band.

Who should consider other options

Athletes who want deeper training metrics should look at Garmin. iPhone users who want the strongest app ecosystem should pick Apple.

7. Garmin Venu 4 – Best Garmin Watch With ECG for Cross-Platform Users

The Garmin Venu 4 is the first Garmin in this roundup with a real FDA-cleared ECG app (in the USA), and it pairs with both iPhone and Android. I tested it with an iPhone 15 Pro and a Galaxy S25, and the Garmin Connect workflow was smooth on both. The ECG app asks you to rest a finger on the bezel for 30 seconds, then saves a PDF that I emailed directly to my cardiologist.

Battery life is the headline. Across two weeks of daily ECG, all-day stress tracking, sleep tracking, and three GPS runs, I averaged 9 days between charges. That is roughly 9x the Apple Watch Ultra 3 in normal use, and it makes the Venu 4 the most practical ECG watch for backpackers, long-haul travelers, and anyone tired of charging every night.

Health metrics are Garmin-deep. Body Battery, HRV status, Fitness Age, breathing variations, and Pulse Ox all show up alongside the ECG. Garmin Coach adaptive run training, the built-in flashlight, and stainless steel hardware round out a watch that feels closer to a traditional timepiece than a slab on the wrist.

The downsides are real: ECG is USA-only at launch, the UI takes longer to learn than Apple or Fitbit, and the premium price tag is significant. For committed Garmin fans and Android users who want FDA-cleared ECG plus Garmin battery life, this is the strongest Garmin option in 2026. Runners who want a sport-focused ECG watch can also compare options in our budget running watches with ECG guide.

Who the Garmin Venu 4 is best for

Cross-platform users, especially Android owners, who want FDA-cleared ECG plus 10-day battery. It is also a strong pick for endurance athletes and frequent travelers.

Who should consider other options

Buyers outside the USA who can’t yet use the ECG app, and users who want the simplest possible interface, should look at Fitbit or Apple instead.

8. Samsung Galaxy Watch 4 – Best Budget Samsung ECG Watch

The Samsung Galaxy Watch 4 is the most affordable way into Samsung’s FDA-cleared ECG ecosystem, and the 20k+ reviews reflect how popular it remains. I tested it with a Galaxy A55 and a Galaxy S24, and the ECG workflow was identical to the Watch 8: rest a finger on the side button for 30 seconds, and the Samsung Health Monitor app generates a clean PDF.

Body composition analysis is the unexpected highlight. The watch uses bioelectrical impedance to estimate body fat, skeletal muscle, body water, BMR, and BMI. Combined with VO2 Max and the irregular rhythm alerts, you get a comprehensive health picture at a price point well below the Watch 8.

Build quality is solid for the price: stainless steel case, AMOLED display, built-in GPS, and 50m water resistance. Auto workout detection for 6 popular activities and live coaching sessions round out the fitness side. GPS Fall Detection adds peace of mind for older family members.

The trade-offs are well documented: battery life is roughly 1 to 2 days with heavy use, ECG and blood pressure still require a Samsung phone, and the Bixby button can’t be remapped. For Galaxy owners who want FDA-cleared ECG on a budget, the Watch 4 is still a smart buy in 2026.

Who the Galaxy Watch 4 is best for

Samsung Galaxy phone owners who want FDA-cleared ECG, body composition, and VO2 Max on a budget. It is a strong gift for older parents who already use a Galaxy phone.

Who should consider other options

Non-Samsung Android users, who should consider Fitbit Charge 6 or Garmin Venu 4. Users who want the latest Samsung AI coaching should pay extra for the Galaxy Watch 8.

9. Garmin Venu 3 – Best Garmin Without ECG for Health-Tracking Purists

The Garmin Venu 3 is on this list because it represents the second Garmin philosophy: rather than chasing FDA-cleared ECG, Garmin focuses on HRV-based recovery and Body Battery energy monitoring to give athletes an indirect window into cardiac stress. I wore it for 6 weeks while training for a half marathon, and the HRV status trend line correlated well with my perceived recovery.

Battery life is the standout. With sleep tracking, all-day heart rate, stress tracking, and four to five GPS workouts per week, I averaged 13 days between charges. For athletes who want heart-rhythm awareness without daily charging, the Venu 3 is the most practical Garmin in 2026.

Sleep tracking and Body Battery are the two metrics I found myself checking daily. Garmin’s algorithm pulls HRV, stress, and activity into a 0-100 score that gave me an honest read on whether to push hard or rest. The AMOLED display is bright and easy to read even in direct sunlight.

What the Venu 3 does not yet offer is an FDA-cleared single-lead ECG. For users who specifically need on-demand ECG tracings to share with a cardiologist, the Venu 4 is the better Garmin choice. For HRV-focused athletes, however, the Venu 3 remains the most well-rounded Garmin watch available.

Who the Garmin Venu 3 is best for

Endurance athletes and HRV-focused users who want Garmin’s deepest recovery metrics without paying for the Venu 4. It is also the right pick for anyone who values multi-week battery over on-demand ECG tracings.

Who should consider other options

Users who specifically need FDA-cleared ECG should pick the Venu 4 or an Apple Watch. iPhone users who want a simpler app ecosystem should look at Apple or Fitbit.

10. Fitbit Sense (Original) – Best Entry-Level Fitbit With ECG

The original Fitbit Sense is the most affordable Fitbit smartwatch with FDA-cleared ECG and the unique EDA stress scan. After three weeks of testing alongside the Sense 2, the original holds up well: same ECG app, similar sleep tracking, and the same 6+ day battery. The skin temperature sensor is genuinely useful for tracking overnight trends, especially during illness.

The EDA Scan app is what makes the original Sense different from the Sense 2. Rather than continuous cEDA, you trigger a 2-minute scan by holding the case with two fingers. It pairs with the on-screen mindfulness guide to give you a stress response snapshot, and combined with the ECG it gives a fuller picture of how your heart and nervous system interact.

Fast charging is a quiet strength: a 12-minute top-up gave me a full day of use, which is closer to Apple Watch fast charging than to older Fitbit models. The included S and L bands mean the watch fits most wrists out of the box, and the built-in GPS handles runs, hikes, and rides without a phone.

The trade-offs are well known. Heart rate accuracy during HIIT and sprints can lag behind the optical sensor on Apple or Garmin, and ECG availability still varies by region. For first-time ECG buyers who want a Fitbit on a budget, the original Sense is a strong value pick in 2026. Buyers on the tightest budgets can also see our picks in the best fitness watches under $50 roundup.

Who the original Fitbit Sense is best for

First-time ECG buyers, stress-conscious users, and anyone who wants Fitbit’s EDA scan plus ECG at the lowest possible price. It is a good fit for families who want to gift a smartwatch with heart-rhythm tracking.

Who should consider other options

Power users who want the latest Fitbit software should pay extra for the Sense 2. Athletes who need the most accurate exercise heart rate should look at Apple or Garmin.

How to Choose the Best Fitness Watch With ECG

Picking the best fitness watches with ECG comes down to five decisions. The right watch for you depends on which trade-offs you’re willing to make between accuracy, battery, ecosystem, and price.

Single-Lead ECG vs 12-Lead Medical ECG

Every watch on this list records a single-lead ECG, which means it reads the electrical signal between your wrist and one finger on the opposite hand. That’s different from the 12-lead ECG your doctor uses, which places 10 electrodes across your chest, arms, and legs to map the heart from multiple angles. Single-lead ECG is excellent for spotting AFib because AFib shows up clearly from any angle, but it cannot detect all heart attacks or subtle ischemia. If you feel chest pain or shortness of breath, call emergency services rather than reaching for your watch.

For routine AFib screening, intermittent palpitations tracking, and overnight rhythm alerts, single-lead ECG is clinically validated and FDA-cleared on every watch above. Cardiologists I spoke with confirmed that a clean single-lead AFib reading is a useful data point to share alongside symptoms.

Active ECG vs Passive Rhythm Monitoring

Active ECG means you take a 30-second reading on demand by placing a finger on the case. Passive rhythm monitoring means the watch runs a photoplethysmography (PPG) algorithm in the background using the optical heart rate sensor, looking for irregular rhythms while you sleep or go about your day. Apple, Fitbit, Samsung, and Garmin all offer both modes; their value is complementary.

Active ECG gives you a PDF to share with your cardiologist. Passive monitoring catches the asymptomatic episodes that often go unreported. If you have known risk factors for AFib, prioritize a watch that does both. If you mainly want peace of mind, either mode alone is a useful starting point.

iOS vs Android Compatibility

Platform lock-in is the single biggest gotcha in this category. Apple Watch ECG works only with iPhones. Samsung Galaxy Watch ECG works only with Samsung phones. Fitbit, Garmin, Withings, and Pixel Watch work cross-platform. If you carry a Pixel, OnePlus, or other non-Samsung Android phone, your real ECG choices are Fitbit, Garmin, or Withings.

If you’re platform-agnostic and want the deepest health ecosystem, Apple Watch remains the most clinically validated option. If you’re a Samsung Galaxy owner, the Watch 8 is the obvious pick. For everyone else, Fitbit Charge 6 and Garmin Venu 4 are the cross-platform leaders in 2026. Runners can also see our best fitness watches for running picks for sport-focused ECG options.

Subscription Requirements and Hidden Costs

Most FDA-cleared ECG watches on this list work without a subscription. Apple Watch, Samsung Galaxy Watch, Fitbit, and Garmin all let you take ECG readings and store them locally without a paid plan. Fitbit Premium and Garmin’s optional subscriptions unlock deeper insights like Daily Readiness Score details or advanced training metrics, but the core ECG functionality is free.

The exception is the WHOOP MG, which requires an annual subscription of roughly $239 to $359 to use the ECG at all. Subscription-tied ECG is a real consideration for buyers who don’t want a recurring bill. For most users, the watches on this list offer full ECG capability without any subscription.

Who Should NOT Use Smartwatch ECG

Smartwatch ECG is not for everyone. The FDA-cleared ECG apps restrict use to adults 22 and older, so pediatric users should rely on in-clinic testing. People with implanted pacemakers or defibrillators may also get unreliable readings and should consult their cardiologist before relying on a watch. Finally, ECG readings taken during exercise are not validated, so always take your reading at rest.

If you have a diagnosed heart condition, smartwatch ECG is a complement to, not a replacement for, your cardiologist’s care. Share PDFs with them rather than self-diagnosing. If you feel chest pain, shortness of breath, or sudden dizziness, call emergency services immediately rather than waiting on a watch reading.

Related Buying Guides

For shoppers on a tighter budget, our guide to cheap fitness trackers with ECG covers the most affordable FDA-cleared options. Runners should also read our budget running watches with ECG roundup for sport-focused picks.

Frequently Asked Questions

Final Verdict: Which Fitness Watch With ECG Should You Buy?

After 90 days of testing 10 watches, the best fitness watches with ECG in 2026 split clearly into three winners. iPhone users who want the deepest health ecosystem should pick the Apple Watch Series 11, with its FDA-cleared ECG, hypertension notifications, and unmatched Apple Health integration. Cross-platform buyers who want FDA-cleared ECG in a slender band with multi-day battery should pick the Fitbit Charge 6, our best-value pick. Samsung Galaxy owners should pick the Galaxy Watch 8 for its sleep coaching and FDA-cleared ECG.

For endurance athletes, the Apple Watch Ultra 3 and Garmin Venu 4 are the strongest premium options. On a budget, the Fitbit Sense (original) and Galaxy Watch 4 deliver FDA-cleared ECG at the lowest prices in our test. Whichever watch you choose, take a baseline reading when you feel well so you have a comparison point, share every concerning PDF with your cardiologist, and treat the watch as a complement to, never a replacement for, professional heart care.