Good for you that you build your first mobile app(s) and for having an inventive mind, but please be aware that there are many many "bad" people out there that

Good for you that you build your first mobile app(s) and for having an inventive mind, but please be aware that there are many many "bad" people out there that will abuse/prank/exploit simple ideas like yours. Keep yourself safe and don't allow people to disturb you in ways you haven't imagined. Unfortunately this is the state of the world right now :-(