Withings ScanWatch 2 Review: Is It Worth the Premium?
An honest look at the Withings ScanWatch 2's ECG accuracy, battery life, subscription structure, and hybrid design, and who it actually suits.
The Withings ScanWatch 2 keeps drawing the same question: can a hybrid analog watch justify a price of roughly $350–$370 when full smartwatches exist at similar or lower price points? If you're researching this watch, you probably already know what makes it appealing on paper. What you need is an honest account of where it delivers, where it falls short, and whether the premium makes sense for your situation.
This review covers design, health tracking, battery life, subscription structure, and the long-term ownership picture. It also looks at who this watch genuinely suits and who would be better served by something else.
What the Withings ScanWatch 2 Actually Is
The ScanWatch 2 is a hybrid analog watch with a small OLED display embedded in the dial. At a glance, it reads as a conventional dress watch. The hands are analog, the case is round, and there is no scrollable screen demanding your attention.
According to Live Science, the display is a 0.63-inch OLED panel at 282 PPI. Small by design. It surfaces notifications, health alerts, and workout data without dominating the dial. Digital Trends, in its 2024 report, noted the watch comes in 38mm and 42mm case sizes, covering a range that suits both slimmer and larger wrists.
The result is a wearable that reads as a watch first and a health device second. For the people most likely to buy it, that distinction matters.
Health Tracking Features
ECG and AFib Detection
This is where the ScanWatch 2 earns the most attention, and the clinical evidence behind it is worth examining carefully.
According to medgrade.org's 2026 analysis, a clinical validation study of Withings' ScanWatch ECG involving 262 subjects reported 96.3% sensitivity for AFib detection and 100.0% specificity for normal sinus rhythm. Those are strong numbers for a consumer wearable. Sensitivity at 96.3% means the watch correctly identified AFib in nearly all classifiable cases where it was present. Specificity at 100.0% means it produced no false positives for normal rhythm in that study population.
The appropriate caveats: the same analysis notes that a meaningful share of recordings (about one in five) were classed as inconclusive and excluded from those figures, clinical study conditions are controlled, and real-world performance across a general population will vary. The ScanWatch 2 does not diagnose anything on its own. Withings positions the ECG feature as a screening and awareness tool, not a clinical instrument. That framing is honest, and the underlying evidence is more rigorous than most consumer wearables can point to.
Sleep Tracking
Sleep tracking is one of the stronger reasons to consider this watch. The hybrid design means most people will wear it to bed without a second thought, which is the first prerequisite for accurate sleep data. A full smartwatch with a touchscreen and notification buzz at 2 a.m. creates friction that a watch like this simply does not.
The ScanWatch 2 tracks sleep stages, breathing disturbances, and heart rate overnight. That data feeds into the Withings app (formerly Health Mate), which presents nightly sleep summaries and trend analysis over time. The app is polished, and the sleep data is among the more detailed available from a non-ring form factor.
Heart Rate, SpO2, and Activity
Continuous heart rate monitoring runs throughout the day. SpO2 measurement is available on demand and during sleep. Step counting, calorie estimation, and automatic workout detection round out the activity tracking side.
These features are competent rather than exceptional. The ScanWatch 2 does not offer the depth of athletic metrics you get from a Garmin, and it does not attempt to. The positioning is health awareness for everyday life, not performance optimization for training.
Battery Life
Live Science reports up to 35 days of battery life, which is one of the most compelling practical advantages of this watch. That figure reflects typical usage: continuous heart rate and sleep tracking with periodic ECG use.
It will compress under heavier sensor use. Frequent ECG checks, frequent SpO2 spot checks, or heavy GPS-connected workout tracking will shorten it noticeably. That is still a meaningful advantage over most full smartwatches, which typically need charging every day or two.
The long battery life is a direct consequence of the hybrid design. The analog movement handles timekeeping, and the small OLED display only activates when needed. For anyone who has grown tired of charging a device every night, this is a genuine quality-of-life improvement.
The Subscription Question
This is where the ScanWatch 2 requires careful reading before you buy.
The hardware price is approximately $349.95–$369.95 depending on retailer and timing. Tom's Guide reports a US price of $369.95. It launched at $349.95, and some retailers still list it near that figure. The variation reflects different retail channels and promotional pricing.
What matters more than the hardware price is what you get without paying more. Core health tracking features, including ECG, sleep staging, heart rate, SpO2, and activity, are accessible without a subscription. The Withings app is free.
Withings does offer a paid tier called Withings+. According to Tom's Guide, Withings+ costs $9.95 per month or $99.50 per year after a free trial month. This tier unlocks additional health programs, guided content, and deeper analysis features within the app.
For most users, the answer to whether you need it is no. The core biometric data is available without it. Withings+ is more relevant if you want a coaching and structured program layer on top of raw data. If you are primarily interested in ECG, sleep tracking, and passive health monitoring, the subscription is optional rather than necessary.
That said, its existence is worth knowing upfront. The watch is not a pure one-time purchase in the way some buyers assume.
Design and Everyday Wearability
The hybrid analog aesthetic is genuinely well-executed. The ScanWatch 2 does not look like a health device. It looks like a watch that happens to have a small secondary display. For professionals who wear watches in formal or business settings, that distinction carries real weight.
The 38mm and 42mm size options cover a reasonable range, and the case is slim enough for dress shirts and suit jackets. Sapphire crystal resists scratching. Silicone and leather strap options give you flexibility between casual and formal contexts.
The small OLED display is a genuine trade-off. You will not be reading long notifications or navigating a menu system on this screen. It shows what it needs to show and nothing more. Whether that is a limitation or a feature depends entirely on what you want from a wearable. If you want a full smartwatch interface, this is not the right product. If you want health data without a screen competing with your watch dial, it is.
Long-Term Ownership Considerations
Most reviews of the ScanWatch 2 stop at the feature list. A few things worth thinking about for the longer term:
Software support horizon. Withings has been in the connected health space since 2008 and has a track record of supporting older devices with app updates. That said, no manufacturer guarantees software support indefinitely, and the health app ecosystem is subject to regulatory changes, particularly around ECG and medical-adjacent features. The ScanWatch 2's value is partly tied to the Withings app remaining functional and supported.
Regional feature differences. ECG and AFib detection are subject to regulatory approval in different markets. The features available to you depend on where you purchased the watch and where you use it. Buyers outside the US and EU should verify which features are active in their region before purchasing.
Repairability. The ScanWatch 2 uses a single crown rather than a touchscreen, and the hands are driven by an analog mechanism. The electronics are less straightforward: this is a sealed, rechargeable device, so battery and sensor servicing is a matter for the manufacturer rather than a local watchmaker. For a watch in this price range, that is worth factoring into a multi-year ownership picture.
Who Should Buy the Withings ScanWatch 2
The ScanWatch 2 suits a specific kind of buyer well. If you want a watch that looks like a watch, tracks your health passively, delivers clinically-referenced ECG and AFib screening, and runs for weeks between charges, this is a strong option in its category.
It suits health-aware professionals who want biometric data without a screen-forward device. It suits people upgrading from a fitness band who want something more appropriate in formal contexts. It suits anyone who places real weight on battery life and finds nightly charging a genuine inconvenience.
It is less suited to training-focused users who want built-in GPS, advanced training load analysis, or detailed workout metrics. Less suited to anyone who wants a full notification and app interface on their wrist. And the hybrid design, while elegant, means you are adopting a purpose-built replacement device rather than adding health tracking to something you already own.
That last point is where a different approach becomes relevant. If you own a mechanical, dress, or vintage watch you are not willing to replace, and you want the same biometric data without adopting a new form factor, Hiyd takes a different approach entirely. Rather than replacing your watch, Hiyd's sensor, under 3mm thick and 7g, attaches to the caseback of the watch you already wear using microsuction, with no glue, no magnets, and no residue. It fits 95% of mechanical watch casebacks and is non-magnetic, so it will not affect automatic winding. It tracks heart rate, HRV, sleep staging, movement, calories burned, and VO2 max estimation, and consolidates everything, including nutrition logged in the app, into a single view called "The Reading." There are zero monthly fees: it is a one-time purchase. Hiyd is not a medical device and does not offer ECG or AFib screening. It launches on Kickstarter in November 2026, with the first batch shipping in Q2 2027, and VIP spots are limited.
Withings ScanWatch 2 vs. the Broader Market
At approximately $349.95–$369.95 for hardware, the ScanWatch 2 sits in a crowded price band. The Oura Ring 4 starts at $349 in hardware but adds a $5.99 monthly fee for full app access. The Garmin Vivoactive 6 is $299.99 with no subscription for core features but is a full smartwatch replacement aimed at athletic users. Apple Watch Series 12 starts at $399 and requires an iPhone.
The ScanWatch 2's clearest differentiator in this group is the combination of analog design, long battery life, and FDA-cleared ECG in a single device. Few watches in this price range match that specific combination. The trade-off is that you are adopting a new form factor, and the optional Withings+ subscription is a cost that compounds over time if you choose it.
Frequently Asked Questions
Is the Withings ScanWatch 2 worth the price? For buyers who want hybrid analog styling, clinically-referenced ECG and AFib detection, and up to 35 days of battery life in one device, the ScanWatch 2 offers a combination that is difficult to match at its price point. Whether it is worth the premium depends on how much those specific features matter to you relative to alternatives in the same range.
Does the Withings ScanWatch 2 require a subscription? The core health features, including ECG, sleep tracking, heart rate, and SpO2, are available without a subscription. Withings offers an optional paid tier called Withings+, which Tom's Guide reports costs $9.95 per month or $99.50 per year after a free trial month. It is not required to use the watch's primary health functions.
How accurate is the AFib detection on the ScanWatch 2? According to medgrade.org's 2026 analysis of a clinical validation study of Withings' ScanWatch ECG in 262 subjects, the watch achieved 96.3% sensitivity for AFib detection and 100.0% specificity for normal sinus rhythm. These figures exclude inconclusive readings and come from controlled clinical conditions; real-world results will vary. A reading from the watch does not replace a clinical diagnosis.
How long does the battery actually last? Live Science reports up to 35 days under typical usage. Heavy use of ECG, SpO2 spot checks, or GPS-connected workouts will reduce that figure. Expect noticeably less than the headline figure under moderate to heavy sensor use.
What size options does the ScanWatch 2 come in? Digital Trends noted in its 2024 report that the ScanWatch 2 is available in 38mm and 42mm case sizes.
Who is the ScanWatch 2 not right for? It is not the right choice for training-focused users who need built-in GPS and detailed training metrics, for anyone who wants a full smartwatch interface, or for watch collectors who want to keep wearing a mechanical or vintage piece they already own. For that last group, a sensor that attaches to an existing watch rather than replacing it is a more relevant category to explore.
How does the ScanWatch 2 compare to the Oura Ring for sleep tracking? Both are strong sleep trackers. The Oura Ring is widely regarded as a leading sleep tracker and is frequently ranked highly by review outlets. The ScanWatch 2 offers sleep staging data in a watch form factor with a much longer battery life. The choice between them depends largely on whether you prefer a ring or a watch on your wrist.
The Withings ScanWatch 2 is a well-made device that earns its place in the hybrid watch category. The ECG evidence is more rigorous than most consumer wearables can point to, the battery life is genuinely useful, and the design holds up in contexts where a fitness band or smartwatch would feel out of place. The optional subscription and the long-term software support question are worth factoring in before you buy.
If your situation is different, specifically if you own a watch you want to keep wearing, the category question changes. Learn more at hiyd.ai.