Level up your health data with insights beyond just weight
Today’s smart scales and body sensors go far beyond just telling you how much you weigh. In 2025, these tools deliver detailed metrics like body fat %, muscle mass, hydration, metabolic rate, and even heart rate variability — all synced seamlessly with your favorite health apps.
Whether you’re training for a race, improving body composition, or optimizing recovery, here are the top smart scales and health sensors worth using.
⚖️ Top Smart Devices for Body Tracking
| Device | Best For | Metrics Tracked | App Ecosystem | Wi-Fi / Bluetooth |
|---|---|---|---|---|
| Withings Body Comp | All-around health tracking | Weight, fat %, muscle, visceral fat, vascular age | Apple Health, Fitbit, MyFitnessPal | ✅ / ✅ |
| Garmin Index S2 | Garmin ecosystem users | Full body composition + trends | Garmin Connect | ✅ / ✅ |
| Fitbit Aria Air 2 | Simplicity + Fitbit sync | Weight + BMI only | Fitbit, Google Fit | ❌ / ✅ |
| RENPHO Elis 1 | Budget full-body tracking | 13 metrics incl. hydration, BMR | Apple Health, Google Fit | ❌ / ✅ |
| Aktiia Optical BP Monitor | Continuous blood pressure tracking | BP, HR | Proprietary + export options | ❌ / ✅ |
1. Withings Body Comp
🧠 Best overall smart scale for health enthusiasts
Withings combines lab-grade accuracy with seamless app sync. The Body Comp model includes vascular age, nerve health index, and works across all major health platforms.
Pros:
✔️ Richest data set available in a consumer scale
✔️ Fully supports Apple Health, MyFitnessPal, Strava
✔️ Clean UI, multiple user profiles
Cons:
➖ Higher price (~$200 USD)
➖ Occasional Wi-Fi sync lag
2. Garmin Index S2
🏃 Best for Garmin users + body comp trends
If you’re deep into the Garmin ecosystem (watch, HR strap, etc.), this scale adds value by integrating your body metrics into your performance dashboard.
Pros:
✔️ Trend graphs on-device
✔️ Auto sync to Garmin Connect
✔️ Multi-user support
Cons:
➖ Only works best within Garmin ecosystem
➖ App interface less user-friendly
3. Fitbit Aria Air 2
🟢 Simple and affordable weight tracking
If you’re just starting out and use Fitbit devices, the Aria Air is a basic but reliable Bluetooth scale. It tracks weight and syncs to Fitbit or Google Fit.
Pros:
✔️ Very affordable (~$60 USD)
✔️ Easy sync with Fitbit app
✔️ Battery-powered, compact
Cons:
➖ Only tracks weight + BMI
➖ No Wi-Fi support
4. RENPHO Elis 1
💸 Best budget smart scale with full metrics
RENPHO offers 13 body metrics, including hydration, BMR, fat-free mass, and more — all for under $50. It’s surprisingly accurate for the price.
Pros:
✔️ Great app with Apple/Google integration
✔️ Super affordable
✔️ Unlimited user profiles
Cons:
➖ No Wi-Fi
➖ Metrics are estimates (not medical grade)
5. Aktiia Optical Blood Pressure Monitor
🩺 Best non-scale body sensor
Though not a scale, Aktiia deserves a mention for its continuous blood pressure and HRV tracking, worn as a cuffless bracelet. Ideal for heart health tracking, recovery analysis, or clinical monitoring.
Pros:
✔️ Validated blood pressure data
✔️ 24/7 tracking without a cuff
✔️ Reports exportable to doctors
Cons:
➖ Expensive
➖ Requires calibration with traditional cuff
🧠 Which Should You Choose?
| If you want… | Choose… |
|---|---|
| Best full-body insight + integrations | Withings Body Comp |
| Seamless with Garmin gear | Garmin Index S2 |
| Simple Fitbit-compatible weight logging | Fitbit Aria Air 2 |
| Budget-friendly + full metrics | RENPHO Elis 1 |
| BP + HRV tracking (non-scale) | Aktiia Sensor |
🛠️ Integration Highlights
Most of these scales and sensors support:
- Apple Health
- Google Fit
- MyFitnessPal
- Samsung Health
- Fitbit / Garmin Connect (brand-dependent)
Conclusion
The best smart scales and health sensors in 2025 give you meaningful, personalized insights into your body — not just numbers. Whether you’re optimizing performance, losing weight, or tracking recovery, there’s a smart device to keep you accountable, informed, and improving.