App for managing toothbrush

So you are a teenager and parents are always telling to brush daily(its a common problem).<br>You have a shared bathroom and in that, you have 1 electric toothbrush and 2-3 people use that same(its also a common problem).<br>So what usually happens is that you keep a track of it manually(say for example you write somewhere that you brushed and parents often don't see that).<br>Also, if 2 people want to brush at the same time they have to communicate and then one has to wait for another to finish.<br>So my app idea is that every toothbrush should have a qr code on it and once you start brushing the app should automatically detect the brushing and the app on your parents' phone should get a notification that you brushed and give the time(in real time).<br>In case of a shared bathroom you can log in to the app and see if the toothbrush is in use and if yes then who is using it or if no one is using then you can manually start the session and once you are done you can end it.<br>Also, you can have rewards system where you get badges and if you brush daily for the next few days then parents can buy items like games, in-game currency etc(like google maps rewards).