A free app for Android, by K R Labs.

Tap Tempo – BPM counter is an Android app that measures the Beats Per Minute of any song by tapping along with it. It includes a full metronome with audio as well as a visually appealing metronome.

By taking an average BPM, the Tap Tempo provides an accurate measurement. The outcomes are presented in an elegant live graph. It also includes an innovative visual metronome of the measured BPM. Tap Tempo lets you save a list of names and BPM values for future reference. The saved list can be sorted by name or BPM scores.

Best of all, you can download this app for free!