I'm not very smartphone savvy and have been struggling with how to put some limits on my tween's phone. I do not want to take it away because it is an important social tool. Is there an app that would allow me to assign durations of time to certain activities (e.g. 1 hr to use apps, 2 hrs for phone calls/texting per day)? I do not want an app where I have to assign a specific hour for the activity (e.g. tween can use apps between 10am and 2pm)