Silent Time is described as 'Silences the phone according to a weekly schedule'. There are four alternatives to Silent Time for Android, Android Tablet, iPhone and Windows Phone. The best alternative is Auto Silent, which is free. Other great apps like Silent Time are Mr.Silent (Free), Quiet Hours (Freemium) and Phone Schedule (Free).
Using Quiet Hours (a.k.a. Do Not Disturb) you can schedule when you want to turn silent mode on or off. Do it manually in application. Or use toggle tile on main screen and turn mode by single click! IMPORTANT!
All-in-one scheduler for Android. Create a task once and it will execute automatically. Configure time and days of week when you want it to repeat. Sound mode, WiFi, Bluetooth, Airplane mode, Brightness, Launch apps, Mobile data, Reminders.