Withings ScanWatch 2 Review: A Hybrid Sleep Watch With 30-Day Battery and Real Apnea Screening
Key Features
Detailed Sleep Tracking
Tracks sleep stages, sleep apnea risk, breathing disturbances, heart rate, and recovery, all without a phone on the nightstand.
30-Day Battery Life
One charge a month is the real selling point. No daily routine, no “did I forget to charge it” nights.
Hybrid Analog Look
Looks like a normal watch with a small PMOLED window for stats. Wearable to bed, to work, and to dinner without looking like a fitness tracker.
Temperature + ECG + SpO2
Skin temperature trending overnight, on-demand ECG, and overnight blood oxygen for sleep apnea screening.
Our Experience
We wore the ScanWatch 2 every night for about 10 days, plus daytime to test the battery claim. It tracks sleep through movement, heart rate variability, and overnight SpO2 dips, then lays it all out in the Withings Health Mate app the next morning. Sleep stages lined up well with what a Garmin and an Oura on the other wrist were reporting on the same nights.
The killer feature for sleep folks is the breathing disturbance detection. Most wearables either skip overnight SpO2 or only sample it. The ScanWatch 2 takes continuous readings and flags potential apnea events. If you have ever been curious whether your sleep is being interrupted by something other than your kid or your dog, this gives you actual data instead of guessing.
The hybrid form factor is the other big win. It looks like a watch, not a wearable. We could wear it under a dress shirt sleeve and still take real ECGs from it on demand. After ten days, the battery was still at 67 percent, which is closer to the 30-day claim than we expected.
Pros & Cons
What We Liked
- 30-day battery life is real, not a marketing exaggeration
- Sleep stage and apnea tracking is genuinely useful
- Looks like a watch, not a fitness band
- No subscription required to access core sleep insights
Worth Knowing
- The PMOLED display is small, not a full smartwatch screen
- No app store, no third-party apps, no music storage
- Notifications are basic, fine for previewing but not for replying
Full Specifications
| Case | Stainless steel, 38 mm or 42 mm |
| Display | Analog dial + PMOLED sub-display |
| Battery Life | Up to 30 days per charge |
| Sleep Tracking | Stages, apnea screening, HR, SpO2, temperature |
| Other Sensors | ECG, GPS (connected), accelerometer |
| Water Resistance | 5 ATM (50 meters) |
| Compatibility | iOS 15+, Android 8+ |
| App | Withings Health Mate (free, no subscription) |
Frequently Asked Questions
Is the sleep tracking accurate enough to trust?
How is it different from the Withings Sleep Pad?
Does it work with the Apple Health or Google Health apps?
Final Verdict
If you want serious sleep tracking, sleep apnea screening, and a watch you can wear into a meeting without explaining yourself, the ScanWatch 2 is one of the few options that nails all three. The 30-day battery and no-subscription pricing seal the deal. For people who care about sleep quality more than push notifications, this is the easiest recommendation we’ve made in months.
As an Amazon Associate, we earn from qualifying purchases.
