My two-year-old wanted my phone, so I built an app that turns it into hers. She gets 12 low-stim apps, including a camera, pretend calls, drawing and music, with no ads, points or streaks. You set a playtime, say 5 minutes, and a pretend battery on her screen drains over that time. At zero the screen goes dark as if the phone has died, so nobody has to take it away. A parent unlocks it afterwards. Works offline on iPhone, iPad and Android.