You can use TimePad on smartphones and tablets that run on an operating system Android or IOS, on tablets that run on OS Anroid. Recommendations: 1. Supported Android 4.0 (Api level 14) to Android 6.0 (Api level 23). 2. If possible, should not be Chinese plates, because they may contain unexpected bugs. 3. Tested devices Samsung S4, Samsung Tab4 and General mobile (Android one).