- Go to Profile.
- Tap the gear icon, then Profile. To edit another user's height, scroll to the Family section and select the correct user.
- Scroll to Height, and enter the height. Be sure to use the correct Units (centimeters or feet and inches)
- Tap Save.
https://support.withings.com/hc/zh-cn/sections/6216069138705-Withings-App-iOS
https://support.withings.com/hc/zh-cn/sections/200501488-Tutorials