This is purely up to you. With the Bluetooth connection, you will need to have your phone to manually start a body composition analysis. With the Wi-Fi connection, you can enjoy all of SENSORI’s convenient features, allowing a seamless user experience for the whole household. Here is how: after the first set up, each member will only need to step on the scale to make his/her measurement and the body composition and heart rate will be automatically sent to his/her NOERDEN App via Wi-Fi, thanks to the user auto-recognition function.