Category · Updated 2026

Smart scales & body composition trackers

Name: Garmin Index S2 Smart Scale
Brand: Garmin
Price: 149.99 USD
Rating: 4.4 (50 reviews)

The single biggest critique of GLP-1 weight loss is that 30–40% of it can be lean mass. A weekly-average smart scale that tracks body fat, muscle mass, and water lets you see whether your strength training is actually working — and catch the problem before it's too late.

How we picked

Bioelectrical impedance across 4+ electrodes (whole-body reading)
Weekly and monthly trend charts, not just single-day snapshots
Multi-user support (household of 2–8)
Syncs to Apple Health / Google Fit / Fitbit natively

#1 Editor's pick
Withings
Body Scan
Segmental body composition + 6-lead ECG — medical-grade at home
4.7
$399
- Segmental readings (leg vs arm vs trunk fat/muscle)
- 6-lead ECG built in — screens for atrial fibrillation
- Best-in-class Health Mate app with automatic Apple Health / Google Fit sync
- Expensive vs basic smart scales
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#2 Top rated
Renpho
Elis 1 Smart Scale
13 body-composition metrics for under $35
4.6
$34.99
- Best price-to-features ratio in the category
- Renpho app is genuinely well-designed
- Unlimited user accounts on a single scale
- Foot-only BIA is less accurate than 4-limb systems for lean mass
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#3 Top rated
Withings
Body+ Smart Scale
Full-body composition + pregnancy mode — the Withings starter
4.6
$99.95
- Same Health Mate app as the flagship Body Scan
- Pregnancy and baby modes built in
- Auto-detects each family member instantly
- No segmental readings (foot-only BIA)
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Eufy
Smart Scale P3
3D virtual body model + 16 measurements
4.4
$79.99
- The 3D avatar is genuinely useful for visualizing change over time
- Chrome-tempered glass looks and feels premium
- Wi-Fi + Bluetooth (no phone required near the scale)
- Eufy Life app is decent but not as polished as Withings
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Garmin
Index S2 Smart Scale
The scale for Garmin Connect users — deep training integration
4.4
$149.99
- Body-comp data lands directly inside Garmin Connect
- Color display shows weather + weight-trend arrow at weigh-in
- Auto-syncs over Wi-Fi to Garmin's training-load models
- Best value only if you own a Garmin watch
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Wyze
Scale X
Heart rate + 12 body-comp metrics under $40
4.3
$39.99
- Heart rate reading during weigh-in (unique at this price)
- Baby/pet mode: weigh yourself holding them, scale subtracts
- Solid Wyze app ecosystem if you already have their cameras
- BIA accuracy is only ok — trust trends, not single readings
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