A great instrumentalist can perform a piece of music at a wide variety of tempos. To truly control her instrument, she must be able to play a passage just as compellingly at rapid speed as she might at a languid speed, and vice versa. For centuries, musicians have practiced playing at a variety of tempos by using a device known as a metronome.

A metronome can help you keep a consistent tempo so that you don’t inadvertently speed up or slow down. It provides a steady click marking a musical interval. Metronome app that help keep steady time when practicing music.