This will depend on the connection you picked. Yes, if you chose the Bluetooth connection as you will need to step on the scale and manually start the body composition analysis on the NOERDEN App. No, if you chose the Wi-Fi connection as after the first set up, each member of your household will only need to step on the scale to make his/her measurement, body composition and heart rate will be automatically sent to his/her App via Wi-Fi, thanks to the user auto-recognition function.