Withings Steel HR 40mm – Hybrid Smartwatch with 25-Day Battery
🔥 #149 in Smartwatches · New Best hybrid smartwatch for battery life & health tracking
Withings ScanWatch 2 – 42mm Hybrid Smartwatch with Medical ECG & 35-Day Battery
Withings 2.8
#149
in Smartwatches
$366.83 →
As of Jul 13, 2026
AI-estimated. See how we score. How we score Affiliate link — we may earn a commission
01 / Spec
Top features
Platform OsWithings HealthSense OS (Proprietary)
Phone CompatibilityiOS & Android via Withings app
DisplayHybrid: analog hands + hidden digital display
The Withings ScanWatch 2 is a hybrid smartwatch that blends traditional analog watch aesthetics with medical-grade health tracking. It runs proprietary HealthSense OS (not watchOS or Wear OS) and works seamlessly with both iOS and Android via the Withings app.
Key features:
- 35-day battery life — industry-leading, far exceeding Apple Watch and Galaxy Watch
- Medical-grade health sensors: 30-second ECG, continuous heart rate with AFib detection, SpO2 tracking, sleep stage monitoring, breathing rate
- Fitness tracking: 40+ sports modes, VO₂ max, heart rate zones, recovery insights
- Design: Stainless steel case, sapphire glass, analog hands with hidden digital display; available in multiple sizes
- Durability: IP68 water resistance; 2-year manufacturer warranty
- Ecosystem: 1 month free Withings+ for personalized health insights
Who it's for: Health-conscious users prioritizing long battery life, medical accuracy, and classic watch appearance over app ecosystem richness. Appeals to those wanting ECG without Apple Watch's iPhone-only requirement.
02 / Signals
Why it's hot
35-day battery and medical-grade ECG in a timeless hybrid design.
- Value for money 39
- Review rating & velocity 61
- Community sentiment 78
- Brand reputation 80
- Search heat 55
- Est. return & defect rate 83
03 / Verdict
Pros & cons
Pros
- Exceptional 35-day battery life
- Medical-grade ECG and AFib detection
- Works with both iOS and Android
- Premium stainless steel build with sapphire glass
- Timeless hybrid design blends elegance with tech
- Accurate health tracking and sleep monitoring
Cons
- Limited app ecosystem vs. Apple/Samsung/Google watches
- Higher price point for feature set
- No cellular or NFC payments
- Proprietary OS lacks third-party apps
- Learning curve for Withings app interface
- Niche brand with smaller community support
Platform OsWithings HealthSense OS (Proprietary)
Phone CompatibilityiOS & Android via Withings app
DisplayHybrid: analog hands + hidden digital display
Case Size42mm (also 38mm available)
BatteryUp to 35 days
GpsBuilt-in GPS
Health SensorsECG, heart rate, SpO2, sleep tracking, breathing rate
Water ResistanceIP68 (50m)
ConnectivityGPS (no cellular)
Weight~60g (approx)
05 / Your take
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05 / Compare
Compare the best alternative
One useful head-to-head in Smartwatches, with the rows most likely to separate the contenders.
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Apple Watch SE 3 (40mm GPS, Midnight Aluminum, Midnight Sport Band)
Battery (days)
25 days Longest battery 18 hours (daily charging required)
App Ecosystem
Minimal—Health app only, no 3rd-party apps watchOS App Store, Apple Health, strong integration
Display
Analog + small OLED sub-screen Retina LTPS with always-on (SE 3 refresh)
06 / Rivals
Compare with
07 / Variations
Other colors & sizes
08 / Browse
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