Smart scales, side by side
Four body-composition scales compared on what they measure, how they send data to your phone, how many people can share them and how they are powered. All four use a small electrical signal through your feet (bioelectrical impedance) to estimate body fat, muscle and water.
| Compare | 
Withings
Withings Body Cardio
1,019.00 SR
Best forHeart readings (heart rate, pulse wave velocity) with your weight | 
Wyze
Wyze Smart Scale X
238.00 SR
Best forFull body composition for the whole family at the lowest price here | ||
|---|---|---|---|---|
| Measures | 50+ body metrics including weight, BMI, body fat and muscle mass; 8-electrode dual-frequency BIA with hand sensors for segmental readings | 13+ metrics including weight, BMI, body fat %, muscle mass, bone density and metabolic age | Weight to 0.1 kg, body fat %, muscle mass, water %, bone mass, heart rate and pulse wave velocity | 13 metrics including weight, body fat %, BMI, muscle mass, water %, bone mass, visceral fat, BMR, protein, metabolic age and heart rate |
| Connection | Bluetooth or Wi-Fi | Wi-Fi and Bluetooth | Wi-Fi and Bluetooth | Bluetooth |
| Capacity | 400 lb (about 181 kg) | 400 lb (about 181 kg) | Up to 180 kg (about 396 lb) | 11 to 400 lb (5 to 181 kg) |
| User profiles | Unlimited profiles in the app | Multiple users, each with their own profile in the app | Up to 8, recognised automatically; Baby and Athlete modes | Up to 8, recognised automatically; baby, pet, luggage and pregnancy (weight-only) modes |
| Power | Rechargeable via USB-C, up to 150 days per charge | Rechargeable via USB | Rechargeable, up to 12 months per charge | 4 AAA batteries, up to 22 months |
| App | RENPHO app | RENPHO app | Withings Health Mate; syncs with 100+ apps including Apple Health, Fitbit and Google Fit | Wyze app; syncs with Apple Health, Google Fit and Fitbit |
| Delivery | Order before 2:00 PM for same day delivery | Estimated delivery: 7-9 days | Estimated delivery: 7-9 days | Estimated delivery: 7-9 days |
| Price | 1,179.00 SR | 446.00 SR | 1,019.00 SR | 238.00 SR |
How to choose
All four scales weigh you and estimate body composition the same way, so the differences are in the detail. Check how the scale sends data: Wi-Fi scales upload a reading without your phone nearby, Bluetooth scales need the app open and in range. Check how many people can use it; the Withings and Wyze recognise up to 8 profiles automatically.
Then check the extra readings you actually want: heart rate and pulse wave velocity on the Withings, hand electrodes for arm, leg and trunk readings on the MorphoScan Nova. Capacity is 400 lb (about 181 kg) on the RENPHO and Wyze scales; the Withings listing does not state it. Finally, check power: rechargeable scales need a USB top-up every few months, the Wyze runs on AAA batteries for up to 22 months. For pregnancy or a weight-only reading, use a mode that switches the electrical signal off.
