Quietish

The app lets you make your phone silent automatically in some selected zones. Once the zone is added, then automatically when you enter in your chosen zone, your phone goes silent. And when you leave that area, the phone goes loud as it was.

The app works on three technologies. If your WiFi or Network is accessible, then the app gets your location from them. But if these are inaccessible, the app looks for GPS and gets your location direct from the satellite. Make sure any one of these is accessible in order to make the app work perfectly.