Best Smartwatch for Health Tracking in 2026: Five Honest Picks

“Smartwatch” is doing a lot of work in the phrase “best smartwatch for health tracking,” and a lot of articles on this topic quietly cheat the definition. They include fitness bands, smart rings, even chest straps. We are not going to do that. For this list a smartwatch means: a wrist device with a real touchscreen, third-party apps, on-wrist notifications, and a watch face you would actually wear in public. That rules out the Fitbit Charge line (a tracker), the Oura Ring (a ring), and the Whoop (a screenless band). If you want those, we cover them in our best fitness trackers roundup and in the broader health tracker comparison.

What is left is a smaller field than the marketing suggests, and the honest answer is that it splits along ecosystem lines before it splits along sensor lines. The Apple Watch is the best health-tracking smartwatch on the market if you have an iPhone, and it is not available to you at all if you don’t. Samsung’s best features require a Samsung phone, not just any Android. Garmin and Withings are the only two on this list that do not care which phone you carry. We will walk through all five.

How we evaluated these

Five things, weighted roughly in this order:

1. Sensor stack and what the regulator says about it. An “ECG feature” is not the same as an FDA-cleared single-lead ECG with an atrial-fibrillation indication; the second thing has a 510(k) number you can look up. We care about the second thing.
2. Ecosystem fit. A watch that works half as well on the wrong phone is not the same product, and we say so.
3. Real-world battery life with the health features on. Not the marketing number with everything turned off.
4. Sleep tracking quality. Heart rate, HRV, skin temperature, respiration, ideally with stage detection that does not embarrass itself against a Zeo or PSG. (Almost no consumer device clears the PSG bar; we say so when we mean it.)
5. What happens if you try to leave. Data export, account portability, whether the watch keeps working if the cloud goes dark. We have a longer view on this after watching Intel turn off the Basis cloud in 2016.

Subscription pricing is a tiebreaker. None of these five paywall basic health metrics, which is the bar; some try harder than others to upsell you on coaching content.

The picks

1. Apple Watch Series 9 — best if you have an iPhone

The Series 9 is the easy recommendation if your phone is an iPhone, because no other watch packages this many FDA-cleared health features in one device. The ECG and AFib History pair are the only consumer system we know of that can both screen for atrial fibrillation and quantify how much of it you are experiencing — Apple specifically applied for and received clearance for the second claim, and it is the kind of detail that distinguishes a real medical-adjacent feature from a marketing one. We have the longer treatment of how single-lead ECGs actually work in our ECG smartwatch explainer, and the temperature feature is unpacked in our piece on skin temperature wearables.

Battery life is the part we cannot defend. Eighteen hours is generous for sleep tracking, and the workaround — charging in the shower, charging while you cook breakfast — is a daily ritual the rest of this list mostly avoids. Apple’s bet has been that the watch is so useful that you will tolerate the charging cycle. They are mostly right, but it is worth saying out loud.

The blood-oxygen situation deserves a callout. After Masimo won an ITC ruling in late 2023, Apple disabled the SpO2 feature on Series 9 and Ultra 2 units sold in the US starting January 2024. Watches sold before that date, or sold outside the US, still measure SpO2. If you specifically want SpO2 on an Apple Watch, buy a refurbished older unit or buy outside the US — we walk through the broader context in our SpO2 wearables piece.

We compare the Apple Watch directly against a Fitbit in Apple Watch vs Fitbit for health tracking, which is the natural next read if you are weighing this against a tracker.

2. Apple Watch SE (2nd Gen) — best Apple budget pick

If we were buying an Apple Watch for someone who is healthy, not specifically worried about a cardiac history, and not interested in skin temperature, we would buy them the SE without much hesitation. The omissions are real but they cluster at the medical-adjacent end of the feature list. Optical heart rate, workout tracking, fall detection, and the entire watchOS experience are identical. You are paying roughly $150 less for a watch that does 80% of what the Series 9 does on the health-tracking front, which is a defensible trade.

The SE is also the smarter buy if you are giving an Apple Watch to an older parent who wants fall detection and emergency SOS, because those features do not require ECG. The bigger watch upgrade for that user is not the sensor stack, it is cellular — being able to call for help without the phone nearby. The SE supports cellular on the GPS+Cellular SKU.

3. Samsung Galaxy Watch 7 — best for Android (with caveats)

The Galaxy Watch 7 is genuinely impressive on paper and is the right pick for someone already in the Samsung phone ecosystem. The sleep apnea screening feature is the most interesting new health capability shipped by a major smartwatch in 2024-2025 — the De Novo authorization is a higher bar than a 510(k) and applies to a condition that is wildly under-diagnosed in the general population. About 80% of people with moderate-to-severe OSA in the US are believed to be undiagnosed. A consumer wearable that nudges a fraction of those people toward a sleep study is a meaningful intervention even if the device itself does not diagnose anything.

The phone-lock problem is the gotcha. ECG, BIA, blood pressure (in markets where Samsung’s BP feature is approved), and the sleep apnea screen all require Samsung Health, which in turn requires a Galaxy phone for full functionality. We have seen Pixel owners buy this watch expecting Apple-Watch-like parity with their phone and discover that the headline features they paid for are inaccessible. If you are not on a Galaxy, this is the wrong watch, full stop — get a Garmin Venu 3 instead.

4. Garmin Venu 3 — best for athletes who also want a smartwatch

The Venu 3 is our pick for the buyer who wants a smartwatch shape but a sport watch brain. Garmin’s training metrics are the deepest in consumer wearables, and on the Venu 3 they sit inside a watch that is small enough and pretty enough that we have worn one to a wedding without anyone commenting. The trade is the app ecosystem: Garmin OS is not Wear OS, and the Connect IQ store is a long way from being able to replace it. If you want Google Maps and the full third-party app catalog on your wrist, you want a different watch.

The no-subscription point is worth dwelling on. Strava charges, Whoop charges, Oura charges, Fitbit Premium charges. Garmin sells you a watch and then leaves you alone. Training Status, Race Predictor, recovery metrics, HRV, sleep stages — all of it is in the free Garmin Connect app. After a decade of watching the wearable industry move toward subscription-everything, that matters more to us each year. We get into this dynamic specifically in Fitbit vs Garmin.

Battery life is the other quietly excellent thing. Ten days of real use in smartwatch mode is roughly fifteen times what an Apple Watch manages, and you can sleep-track without choreographing your charging schedule. Garmin’s GPS battery efficiency has also improved enough that a 10-hour ultramarathon does not drain the watch.

5. Withings ScanWatch 2 — best hybrid for low-fuss health tracking

We have written about the ScanWatch 2 enough that it shows up in three other roundups; the full piece is in our ScanWatch 2 review. The short version is that it is the watch we recommend for people who do not actually want a smartwatch but do want the health data. It looks like a Swiss-made automatic from across the room. It charges once a month. The OLED is small enough that you cannot doom-scroll on it.

The ECG clearance is real and worth a beat: 510(k) K221976, with an amendment in 2023 adding continuous rhythm notification. That is a higher bar than the static ECG-on-demand feature alone, and it puts the ScanWatch on the small list of consumer devices that can flag potential AFib in the background rather than only during a 30-second hold.

The compromise is the screen. If you want apps, music, payments, and a real notification surface, this is the wrong product — buy an Apple Watch or a Galaxy. If you want the health features and you have made peace with picking up your phone for everything else, the ScanWatch 2 is a quietly excellent product that is much rarer than it should be.

Side-by-side comparison

The ecosystem trap is the real decision

Most of the questions we get about this list come down to “I want an Apple Watch but I have an Android” or “I have a Samsung phone but my partner is on iPhone, can we share data?” The answer is almost always: the ecosystem decision is bigger than the watch decision. A few specifics, because the marketing obscures this:

watchOS is fully iPhone-only. There is no Android pairing path, official or otherwise. ECG, AFib History, and the temperature sensor all require iOS. Apple Health data syncs across iPhones and iPads via iCloud but does not export cleanly to anything outside the Apple universe. If you switch to Android, you lose access to historical Apple Health data in any practical sense.

Wear OS is the underlying platform on the Galaxy Watch 7, but Samsung layers Samsung Health on top, and Samsung Health’s most interesting features (ECG, BIA, sleep apnea screening) require a Samsung Galaxy phone. A Pixel can pair with a Galaxy Watch, but the experience is materially worse. The Pixel Watch 3 — which we have not included here because it does not yet ship FDA-cleared ECG with the same range of indications — is the Pixel-native answer, and is improving fast.

Garmin Connect runs on iOS and Android equally well. The watch experience is identical regardless of phone. Garmin has no horse in the phone race, which is part of why we recommend the Venu 3 to anyone whose primary phone is anything other than a Samsung Galaxy or an iPhone.

Withings Health Mate is also phone-agnostic. The ScanWatch 2 pairs with any reasonably modern iOS or Android device and the feature set does not change. Withings’s account model is closer to a fitness data warehouse than to an ecosystem, which fits the watch’s character.

The implication is that if you are deciding between an Apple Watch and a Galaxy Watch on health features, you have already made the bigger decision by picking your phone. We have seen people switch phones to get the Apple Watch they wanted, and at least one go the other way to get BIA and sleep apnea screening on a Galaxy. That is, frankly, a lot of work for a watch.

Medical claims: what these watches can and cannot say

We have been careful in this piece to distinguish “FDA-cleared” features from general wellness ones, because the regulatory line matters and the marketing obscures it.

A 510(k) clearance is a specific permission to make a specific claim — for example, that the Apple Watch’s ECG feature can identify signs of atrial fibrillation in adults 22 and older with no diagnosed history of AFib. The clearance does not authorize a diagnostic claim. The watch can flag a rhythm. A clinician diagnoses the rhythm. The same applies to the Galaxy Watch’s ECG and to the ScanWatch’s. The Galaxy Watch’s sleep apnea feature went through De Novo (DEN230064), a different and somewhat higher-bar pathway because no predicate device existed; the cleared claim is for risk identification, not diagnosis.

Wellness features — Body Battery, Readiness, the AGEs Index, BIA body composition — are explicitly not cleared as medical devices and the manufacturers do not claim they are. They are pattern-recognition layered on sensor data, useful as directional signals, not as numbers to make medical decisions on. We labor this point because the line gets blurred constantly in user reviews and YouTube videos. If a watch makes a quantitative health claim, look up the 510(k) or De Novo number; if it is not there, the claim is wellness-grade. That is fine, as long as you treat it as such.

Who should buy what

Quick decisions, in the order we would actually have them with a friend:

• iPhone, want the best health watch, do not mind charging daily: Apple Watch Series 9.
• iPhone, want most of the health features and a much better price: Apple Watch SE 2nd Gen.
• Samsung Galaxy phone, want the most experimental and most fully integrated Android health watch: Galaxy Watch 7.
• Any phone, especially Pixel or OnePlus, and you run or cycle: Garmin Venu 3.
• Any phone, you want the data without looking like you are wearing a smartwatch, and you are tired of charging things: Withings ScanWatch 2.

The Series 9 is the most capable health-tracking smartwatch on the market right now. The ScanWatch 2 is the one we are most likely to recommend to someone who is not specifically asking us, because the calculus of charge-once-a-month plus FDA-cleared ECG plus a watch that does not look like a computer is unusual and durable. The Venu 3 is the underrated one, because it solves the Android-without-Samsung problem better than anything else and does not gate any of its data behind a paywall.

What none of these are is a replacement for medical care. A consumer ECG is a screening tool. A sleep apnea screen is a risk indicator. A skin-temperature trend is a hint. The watches on this list have moved a meaningful number of people toward an actual cardiologist or sleep specialist in the last few years, which is the right outcome. Buying a watch to avoid talking to a doctor is the wrong outcome, and we want to be plain about that.