Most smartwatches want to become the screen you check after putting your phone away. The Withings ScanWatch 2 takes the opposite route: it looks like an ordinary analog watch and keeps most of its technology out of sight.
Behind the physical hands and stainless-steel case are ECG, SpO₂, heart-rate, temperature, sleep and activity tracking. There is a small digital display for essential information, but the deeper analysis stays inside the Withings app rather than taking over your wrist.
The Withings ScanWatch 2 also brings sapphire crystal, 5 ATM water resistance, 38mm and 42mm case options and claimed battery life of up to 35 days. HealthSense 4 has added REM sleep detection, improved temperature analysis and stronger overnight tracking, making the real question less about what this watch can do—and more about how much smartwatch you actually want on your wrist.
Key Takeaways
- Withings ScanWatch 2 blends a traditional analog design with ECG, SpO₂, temperature, heart-rate and sleep tracking.
- Battery life is a major advantage, with Withings claiming up to 35 days between charges.
- The watch comes in 38mm and 42mm sizes, with sapphire crystal and 5 ATM water resistance.
- Withings ScanWatch 2 has no built-in GPS, so runners and cyclists need a connected phone for route tracking.
- HealthSense 4 adds REM sleep detection, improved temperature insights and better overnight tracking, but the tiny display remains a clear trade-off.
Specifications
The Withings ScanWatch 2 combines traditional watch construction with a surprisingly broad set of health sensors. Its stainless-steel case, sapphire crystal and 5 ATM water resistance give it a more premium feel than a typical fitness tracker, while the 0.63-inch OLED keeps the smart interface deliberately small.
| Feature | Specification |
|---|---|
| Type | Hybrid analog smartwatch |
| Sizes | 38mm and 42mm |
| Display | 0.63-inch grayscale OLED |
| Glass | Sapphire crystal |
| Case | Stainless steel |
| Water resistance | 5 ATM / 50m |
| Heart-rate tracking | Yes |
| ECG | Yes |
| Blood oxygen (SpO₂) | Yes |
| Temperature tracking | Yes |
| Overnight HRV | Yes |
| Sleep tracking | Yes |
| REM sleep detection | Yes, with HealthSense 4 |
| Workout modes | 40+ |
| Built-in GPS | No |
| Smartphone notifications | Yes |
| Battery life | Up to 35 days |
| Charging time | About 2 hours |
| Connectivity | Bluetooth Low Energy |
| Compatibility | iOS and Android |
| Withings+ required? | No; optional premium service |
Inside the Withings ScanWatch 2 are Withings’ TempTech24/7 temperature module, multi-wavelength PPG sensor, accelerometer and altimeter. That hardware supports most of the watch’s everyday health, sleep and activity tracking without changing its traditional analog appearance.
38mm vs 42mm: Which Size Is Better?
The Withings ScanWatch 2 comes in two case sizes, but the choice affects comfort more than smart functionality. The 38mm model is lighter and better suited to smaller wrists or overnight wear, while the 42mm version has a stronger wrist presence and may feel more natural to people accustomed to larger traditional watches.
| Feature | 38mm | 42mm |
|---|---|---|
| Diameter | 38.4mm | 42mm |
| Thickness | 13.4mm | 12.9mm |
| Weight without strap | 34.6g | 52.6g |
| Digital display | 0.63 inch | 0.63 inch |
| Band width | 18mm | 20mm |
| Approx. wrist range | 146–211mm | 163–239mm |
Choose the 38mm if:
- You have a smaller wrist
- You want the lighter option
- You plan to wear it while sleeping
- You prefer a discreet watch
Choose the 42mm if:
- You have a larger wrist
- You prefer a more substantial watch
- You normally wear 40–44mm traditional watches
One detail worth knowing: both sizes use the same 0.63-inch digital display. Choosing the 42mm model gives you a larger case, not a larger smartwatch screen.
Why the Withings ScanWatch 2 Feels So Different
The Withings ScanWatch 2 stands out by hiding most of its technology behind a traditional watch face. Analog hands stay front and center, while the small digital display handles health readings, workouts and notifications only when needed.
That makes the watch feel less intrusive in daily use, especially for people who want health tracking without wearing a bright touchscreen all day.
Withings ScanWatch 2 Product Info and Reviews
Current Withings ScanWatch 2 product info and reviews point to a clear balance between health tracking and simplicity:
- Strengths: classic design, long battery life, ECG, SpO₂, temperature and sleep tracking
- Limitations: no built-in GPS, small display and limited smartwatch apps
- Best for: everyday health tracking and users who prefer a traditional watch
- Less suitable for: serious runners, cyclists and users who want maps or advanced workout metrics
Design and Build Quality
The Withings ScanWatch 2 gets the details that matter on a traditional watch right: a stainless-steel case and crown, sapphire crystal and replaceable straps. The 5 ATM water-resistance rating also means it is built for everyday wear rather than careful, occasional use.
- Stainless-steel case and crown
- Sapphire crystal glass
- 5 ATM / 50m water resistance
- 18mm straps on the 38mm model
- 20mm straps on the 42mm model
Sapphire crystal is the standout material here because it is far more resistant to everyday scratches than the glass used on many cheaper wearables. Live Science also came away impressed with the construction after wearing its test watch through regular daily use and gym sessions.
The Tiny Screen Is Both Brilliant and Frustrating
The 0.63-inch display on the Withings ScanWatch 2 tells you just enough: heart rate, workout data, alarms, activity progress and incoming notifications. Anything more detailed usually sends you back to the phone app.
That sounds like a weakness—and for some buyers it absolutely is. Tom’s Guide found the small display limiting when more detail was needed. But shrinking the screen is also what allows the analog dial to remain the focus. If you want to read messages, study graphs or navigate apps from your wrist, it will feel cramped. If you mainly want your watch to collect data quietly, the small screen makes much more sense.
How Smart Is the Withings ScanWatch 2?
The Withings ScanWatch 2 handles the essentials without trying to replace your phone. It can show alerts for calls, texts, emails, calendar events and supported apps such as WhatsApp, Instagram and Facebook.
What it does not offer is equally important:
- No large touchscreen app experience
- No maps or wrist navigation
- No extensive app store
- Limited message interaction
- No attempt to function as a phone replacement
Its role is simple: show you what needs attention, then get out of the way. That restraint will feel limiting to power users, but it is also a big part of the watch’s appeal for anyone who wants fewer distractions on their wrist.
Heart-Rate Monitoring and Heart Health
Heart tracking is where the Withings ScanWatch 2 starts to feel more serious than a typical hybrid watch. It quietly monitors cardiovascular signals in the background while still giving you access to on-demand measurements when you want a closer look.
Its main heart-health tools include:
- Continuous heart-rate monitoring
- High and low resting-heart-rate alerts
- Single-lead ECG
- Overnight HRV
- SpO₂ readings
- Respiratory insights
What Does Overnight HRV Tell You?
Overnight HRV is most useful as a trend, not a score to compare with someone else. The Withings ScanWatch 2 combines HRV with sleep, temperature and breathing data to provide more context around recovery and physical stress, while some deeper Readiness insights sit within Withings+.
Does Withings ScanWatch 2 Have ECG?
Yes. The Withings ScanWatch 2 uses electrodes built into the watch body and bezel to record a single-lead ECG in about 30 seconds. In the United States, this ECG feature is FDA-cleared, although availability and regulatory status can differ by country.
One detail matters here: ECG and SpO₂ do not carry the same status. Withings describes U.S. SpO₂ readings as recreational-grade oxygen-saturation information, so neither feature should be treated as a substitute for professional medical evaluation.
Can You Send ScanWatch 2 ECG Results to a Doctor?
Yes. The Withings ScanWatch 2 can turn an ECG reading into a shareable PDF through the Withings app, including heart rate, rhythm analysis and the recorded ECG waveform.
That makes the feature more useful than a one-time wrist reading. You can keep a record and share it with a healthcare professional when a closer discussion is needed.
Important Medical-Device Warning
ScanWatch 2 is not suitable for everyone. People with pacemakers or certain other implanted active medical devices should follow Withings’ safety guidance and speak with a healthcare professional before using ECG-related features.
The watch should also be treated as a monitoring tool, not as a replacement for diagnosis, medical testing or professional care.
Health Features Differ by Country
The Withings ScanWatch 2 does not offer the exact same health features in every market. ECG, SpO₂, Respiratory Scan, heart-rate alerts and related functions can vary because medical-device approvals differ by country.
If one specific health feature is the main reason you are buying the watch, check its availability in your region before purchasing.
Temperature Tracking Is More Useful as a Trend Than a Number
The Withings ScanWatch 2 uses TempTech24/7 to track changes in wrist temperature during sleep, workouts and everyday wear. The important part is the pattern over time—not one isolated reading.
It is not a clinical thermometer and should not be used to diagnose fever or illness. Where the Withings ScanWatch 2 becomes more useful is in spotting changes from your usual baseline alongside sleep, activity and other health data.
Menstrual Cycle and Temperature Tracking
HealthSense 4 gives the Withings ScanWatch 2 a bigger role in cycle tracking by using nightly temperature changes alongside logged periods and symptoms. Temperature patterns can also contribute to cycle predictions and retrospective ovulation estimates.
These insights are designed for tracking patterns, not for contraception, conception planning or medical fertility decisions.
Sleep Tracking Gets Better With HealthSense 4
Sleep tracking is one of the Withings ScanWatch 2 features that benefits most from passive monitoring. HealthSense 4 expands the overnight picture with:
- REM sleep detection
- Sleep duration and stages
- Overnight HRV
- Temperature trends
- Breathing measurements
- Oxygen-saturation trends
How Good Is It in Real Life?
Sleep data is better treated as a trend than a nightly scorecard. Short awakenings or periods of quiet wakefulness may not always be captured perfectly, so the more useful questions are whether your sleep duration, HRV, resting heart rate and temperature patterns are changing over time.
That long-term view tells you far more than worrying about a few minutes of difference in a single sleep stage.
Is ScanWatch 2 Comfortable Enough for Sleep?
Comfort depends heavily on case size. The 38mm Withings ScanWatch 2 weighs 34.6g without the strap, while the 42mm version weighs 52.6g, making the smaller model the easier choice for overnight wear, especially on smaller wrists.
If sleep tracking is a priority, the 38mm version is likely the better fit. The 42mm can feel more substantial in bed, particularly for side sleepers or anyone sensitive to bulk on the wrist.
Fitness Tracking: Capable, but Not Athlete-First
The Withings ScanWatch 2 covers the basics well, with automatic activity detection, step and elevation tracking, plus more than 40 workout modes for activities such as walking, running, cycling, swimming and gym sessions.
- Walking and daily activity
- Running and cycling
- Swimming
- Gym workouts
- Calories and steps
- General workout history
The Big Limitation: No Built-In GPS
The biggest fitness compromise is GPS. The Withings ScanWatch 2 relies on a connected smartphone for outdoor route tracking, so it is better suited to casual exercise than serious training.
That will barely matter if you already carry your phone on walks or runs. For marathon training, long rides or hikes where you want to leave the phone behind, a dedicated GPS sports watch will make more sense.
How Accurate Is the Withings ScanWatch 2?
Accuracy on the Withings ScanWatch 2 depends on what you are measuring. Resting heart rate, sleep, temperature and activity trends are generally more useful over time, while harder workouts can expose bigger differences in heart-rate readings.
Fit and movement matter too. A loose strap, poor skin contact or intense exercise can affect results, which is why single readings should not be treated as perfectly precise.
| Measurement | Best Use |
|---|---|
| Resting heart rate | Long-term health trends |
| ECG | On-demand rhythm recording where supported |
| HRV | Recovery and overnight trends |
| Temperature | Changes from your personal baseline |
| Sleep | Patterns over time rather than exact nightly precision |
| Steps | General activity tracking |
| Workout heart rate | Useful for casual exercise; athletes may prefer a chest strap |
| SpO₂ | Wellness information where supported |
The Withings ScanWatch 2 makes the most sense when you look for patterns across days and weeks. Its value is less about one perfect reading and more about showing how your health data changes over time.
Battery Life May Be Its Most Underrated Health Feature
Withings claims up to 35 days of battery life for the Withings ScanWatch 2, with a full charge taking about two hours. That matters because longer battery life means fewer gaps in sleep, HRV, temperature and resting-heart-rate data.
- Sleep and overnight HRV
- Temperature trends
- Resting heart rate
- Respiratory data
Real-world endurance will vary with usage, but even falling short of the maximum still leaves it far ahead of many full-screen smartwatches that need charging every few days.
Everyday Ownership: Straps, Charging and Durability
The Withings ScanWatch 2 is easy to live with because much of the ownership experience still feels like wearing a normal watch. Both sizes use replaceable straps, while the stainless-steel case and sapphire crystal should hold up well to regular wear.
- 38mm model: 18mm straps
- 42mm model: 20mm straps
- Dedicated charging dock included
- Sapphire crystal for added scratch resistance
- 5 ATM water resistance
The main thing for existing Withings owners to note is charging compatibility: older ScanWatch charging hardware should not be assumed to work with the newer model.
The Withings App Is Half the Experience
The small screen on the Withings ScanWatch 2 is only part of the story. Most of the useful detail lives in the Withings app, where heart rate, ECG, sleep, HRV, temperature, SpO₂, workouts and longer-term trends are easier to read and compare.
- Heart rate and ECG
- Sleep and HRV
- Temperature and SpO₂
- Activity and workouts
- Cycle tracking
- Long-term health trends
The setup is simple: the watch gathers the data, while the phone gives it context. That works well if you prefer a quiet wrist experience, but it may frustrate anyone who wants detailed charts and insights directly on the watch.
Apple Health, Health Connect, Strava and Other Integrations
The Withings ScanWatch 2 can also share data with services you may already use, including Apple Health, Health Connect, Strava and MyFitnessPal. RunKeeper can be connected separately through a browser-based setup.
Strava support is especially useful for workouts, allowing compatible activity data such as distance, duration, route and heart rate to move into an existing fitness history. That makes switching to Withings less disruptive if years of health or workout data already live elsewhere.
HealthSense 4 Makes the 2026 ScanWatch 2 Better Than the Launch Version
Older reviews can undersell the Withings ScanWatch 2 because HealthSense 4 has expanded what the watch can do since launch. The update adds deeper overnight and temperature tracking rather than simply changing the app interface.
HealthSense 4 adds or improves:
- REM sleep detection
- Continuous temperature analysis
- Overnight breathing measurements
- Overnight SpO₂ insights
- Cycle tracking
- Guided breathing exercises
For 2026 buyers, that matters. The watch is more capable than it was at launch, so older reviews may no longer reflect its current sleep, temperature and recovery features.
Withings ScanWatch 2 Price in 2026
The Withings ScanWatch 2 sits firmly in premium wearable territory. As of August 14, 2026, it is listed at $369.95 in the U.S. and ₹35,900 in India, although promotions can change the final price.
What you are mainly paying for is:
- Sapphire crystal and stainless-steel construction
- ECG and SpO₂
- Temperature sensing
- Sleep and heart-health tracking
- Long battery life
- Hybrid analog design
The value depends on priorities. Buyers who care about health tracking, traditional styling and weeks between charges may find the price easier to justify than those looking for a large screen, apps or advanced sports features.
Withings ScanWatch 2 vs ScanWatch Light
ScanWatch Light is the cheaper way into Withings’ hybrid-watch lineup, while ScanWatch 2 earns its higher price with more serious health hardware. The key additions are ECG, SpO₂, temperature tracking and sapphire crystal.
| Feature | ScanWatch 2 | ScanWatch Light |
|---|---|---|
| ECG | Yes | No |
| SpO₂ | Yes | No |
| Temperature tracking | Yes | No |
| Heart-rate tracking | Yes | Yes |
| Sleep tracking | Yes | Yes |
| Hybrid analog design | Yes | Yes |
| Sapphire crystal | Yes | No |
| U.S. list price* | $369.95 | $249.95 |
*Prices checked August 14, 2026 and may change.
ScanWatch Light makes more sense if heart rate, sleep and everyday activity are enough. Choose the Withings ScanWatch 2 if ECG, blood-oxygen readings and temperature trends are features you will actually use.
Withings ScanWatch 2 vs ScanWatch Nova
ScanWatch Nova takes the same hybrid-health idea into luxury-watch territory. At $599.95 in the U.S., it costs considerably more, with much of that premium tied to its higher-end design and traditional-watch styling.
For buyers focused primarily on health features and value, the Withings ScanWatch 2 is the more balanced choice. Nova makes more sense when premium materials and watch-like aesthetics matter enough to justify the extra cost.
What ScanWatch 2 Gives Up Compared With a Full Smartwatch
The Withings ScanWatch 2 deliberately leaves out many features found on full smartwatches. There is no large touchscreen, built-in GPS, extensive app ecosystem or detailed wrist navigation.
Those omissions come with clear benefits:
- Fewer notifications and distractions
- Traditional analog styling
- Up to 35 days of battery life
- Passive health tracking
- Simple controls
- Android and iOS compatibility
That is the real trade-off. Giving up apps, maps and a large screen is also what allows the watch to stay discreet, last for weeks and still look like a conventional timepiece.
Withings ScanWatch 2 Pros and Cons
The Withings ScanWatch 2 works best when its strengths match what you actually want from a wearable.
| Biggest Advantages | Biggest Compromises |
|---|---|
| Classic analog design | No built-in GPS |
| Up to 35-day battery life | Very small digital display |
| FDA-cleared ECG in the U.S. | Limited smartwatch apps |
| Sapphire crystal | Detailed insights require the phone app |
| 24/7 temperature trends | Less advanced sports analysis |
| Sleep tracking and overnight HRV | 42mm model may feel bulky during sleep |
| Replaceable straps | Premium price |
| Android and iOS support | Some health features vary by country |
Who Should Buy the Withings ScanWatch 2?
The Withings ScanWatch 2 is best suited to people who want serious health tracking without wearing a full-screen smartwatch.
Buy it if you:
- Prefer the look of a traditional analog watch
- Want ECG, temperature, sleep and heart-rate tracking
- Value weeks of battery life
- Want fewer wrist notifications and distractions
- Are comfortable viewing detailed health data on your phone
- Need something discreet enough for work or formal wear
It is especially appealing if you have tried a conventional smartwatch before but found the constant screen, notifications or frequent charging irritating.
Who Should Skip It?
The Withings ScanWatch 2 is harder to recommend if fitness performance or wrist-based apps are your priority.
Look elsewhere if you:
- Need built-in GPS
- Train seriously for running or cycling
- Want advanced workout metrics
- Need maps or navigation on your wrist
- Frequently reply to messages from your watch
- Want a large touchscreen and downloadable apps
- Are shopping primarily for the lowest-priced fitness tracker
For serious athletes, the limitation is straightforward: it can record workouts, but it is far better at tracking health around your training than guiding the training itself.
Is Withings ScanWatch 2 Worth It in 2026?
At $369.95 in the U.S., the Withings ScanWatch 2 is expensive if you judge it by apps, screen size or sports features. Its value comes from offering something different: serious health tracking inside a watch that does not constantly demand attention.
You are choosing:
- Physical hands instead of a permanent touchscreen
- Weeks of battery life instead of frequent charging
- Passive health monitoring instead of constant interaction
- ECG, sleep and temperature insights instead of wrist apps
- Traditional styling instead of a miniature phone
That trade-off is what makes the Withings ScanWatch 2 worth considering in 2026. It is a strong fit for people who value health data, long battery life and analog design, but a weaker choice for serious athletes or anyone who wants GPS, apps and detailed workout tools on the wrist.
Conclusion
The Withings ScanWatch 2 is not trying to win the smartwatch race on apps, screen size or sports features. Its advantage is more specific: it delivers serious health tracking in a form that still feels like a traditional watch.
ECG, SpO₂, temperature trends, sleep tracking, HRV and HealthSense 4 give it meaningful depth, while the claimed 35-day battery life removes one of the biggest frustrations of conventional smartwatches. The trade-offs are equally clear—no built-in GPS, a very small display and limited on-wrist interaction.
That makes the buying decision relatively simple. The Withings ScanWatch 2 is compelling for people who value long-term health monitoring, understated design and fewer digital distractions. Athletes who need advanced training metrics or users who want apps, maps and rich notifications will find better options elsewhere.
At $369.95, it is not a value play. It is a deliberate alternative to the modern smartwatch—and for the right buyer, that distinction is precisely what justifies the premium.
Frequently Asked Questions
1. Does Withings ScanWatch 2 have a smart alarm?
Yes. Withings ScanWatch 2 supports Smart Wake-up, which can vibrate during a selected wake-up window rather than waiting for one exact alarm time.
2. Can Withings ScanWatch 2 track data without a phone nearby?
Yes. The watch can continue recording data when your phone is away and sync it later through Bluetooth. Its onboard storage is limited, so regular syncing is recommended.
3. Does Withings ScanWatch 2 remind you to move?
Yes. Withings ScanWatch 2 can send an Activity Reminder after an extended period of inactivity, provided the feature is enabled and certain conditions are met.
4. Can you choose which apps send notifications to Withings ScanWatch 2?
Yes. You can select which compatible third-party apps are allowed to send notifications to the watch through the Withings app.
5. How many alarms can Withings ScanWatch 2 store?
Withings ScanWatch 2 supports up to 10 alarms, and individual alarms can be scheduled for selected days of the week.
6. Can you snooze an alarm on Withings ScanWatch 2?
Yes. Holding the watch button while an alarm is vibrating activates a 10-minute snooze.
7. What colors does Withings ScanWatch 2 come in?
Current finishes vary by size and market, with options including Silver Black, Silver White, Rose Gold Sand, Rose Gold Blue and Midnight Blue.
8. Can Withings ScanWatch 2 detect an irregular heart rhythm?
The watch can support irregular-heart-rhythm notifications in eligible regions, although availability varies by market and the feature is currently unavailable to U.S. users according to Withings support.
Source: Cosmo Politian
