Train your timing. Determine the beat, add speed, and with a finger tip to “Start”, off you go. Start slowly and increase your pace gradually. By the way – the speed is defined in beats per minute (BPM, beats per minute). To change the volume you use the volume keys of your smartphone as usual.
By the way: In the settings you can choose the instrument that gives you the rhythm.
Select the instrument which makes the rhythm. You can choose from a large selection of percussion instruments and a few other sounds.