The B'Metronome app is a free Android app for keeping track of your tempo. The app has a lot of presetted tempos from 30 bpm to 220 bpm that can play with 9 voices (drums, triangles, etc.). You can also tap the rhythm and the app provides you with the last tapped rhythms and the average of all your taps. There is a play and pause button that you can use to terminate the metronome, which by the way is capable of playing in the background. You can use this app both on a tablet and on a phone, as long as they have recent Android versions (2.2 and up). This metronome has the advantage of being compact, even if it does not have visual of the rhythm or any flashlight functionalities. What is really useful is that you can very easily find the tempo, and, you can also manually type it as well as tap it. The B'Metronome is a really useful app for getting the metronome to sing along, has a variety of sounds suited to everything you may play and can offer a great range of tempo that you will find works with anything you will play.