Hello to all, As part of the development of an application, I would like to link my user's account to a cell phone in order to ensure that the user uses only one cell phone, is this possible and how to do it? I would also like to make sure that this phone is used. To do this, I thought of checking that a SIM card is connected to the phone in question, is this possible and how can I do it? Do you have any other ideas? Thank you for your help.

Hello to all, In the context of the development of an application, I would like to recover the data related to screen time, is it possible? If yes, how to do? And is it possible to recover the data of screen time by application? Thank you in advance for your answers.