Time speeches in debates and have the bell ring automatically at the correct time. It supports most parliamentary styles of debating. The app rings a bell, vibrates and/or flashes the screen white (or any combination of the three) at bell times. It also rings overtime bells, which are configurable. There is a different bell sound, derived from the https://f-droid.org/packages/org.yuttadhammo.BodhiTimer bell.