Dual metronome. It may be useful for tuplets or polyrythm exercises. Single Tap starts/stops the metronome. Dragging vertically changes the tempo. By Pinch in/out you can set the beats. 1 - 12 beats 4 - 2400 bpm (see below) 6 types of sound volume, pan settings bookmarks --- ver. 2.0 (2014.06): New tab interface. Bookmarks available. --- From ver. 1.3 the beats value has no constrain. Simply the entire length is limited in 300 - 15000 [ms]. The bpm range depends on the beats value: 4 - 200 bpm on 1 beat, 48 - 2400 bpm on 12 beats.