When there is an active Bluetooth connection between the Philips body analysis scale and the Jovia health app the app will automatically assign a user. If someone else takes a measurement and you are in close proximity to the scale with your app open, their measurement will be automatically added to your profile. This will only happen in this kind of situation. If there is no open app in proximity to the scale while a measurement is being taken, the measurement will be assigned to the user profile in the scale at that time.