Bell Tower - Know the Time is a free Android application developed by Plague.cz. This app allows you to know the time by ringing a bell every 15 minutes and on the top of the hour. The app offers various sounds including cuckoo-clock, grandfather clock, and other sounds to choose from.

This app is a great utility tool for those who want to have a rough idea of the time without having to check their device constantly. It is also useful for those who want to add a vintage touch to their Android device. The app is easy to use and does not require any special settings.