How it works
A 3/8 metronome counts the eighth note, three to a bar, with the first click higher. This one opens at 72 eighth notes a minute, a bar every 2.5 seconds, and the number you type is always the eighth-note tempo.
Read the full guide
Start
Tap the pad, or press Space: the first of every three clicks is the higher one. Tap again to stop.
Change the tempo
Tap the number under the pad and type the eighth-note tempo you want; 104, 105 and 110 are as easy as 72. Minus and plus change it by one.
Questions and answers
What is the difference between 3/8 and 3/4?
The note that is counted: an eighth here, a quarter there. Wikipedia's Time signature article calls the two mathematically interchangeable, since a piece in 3/4 can be rewritten in 3/8 by halving its notes, and says 3/8 usually suggests a higher tempo.
Is 3/8 simple or compound time?
Simple. Open Music Theory's table of metres puts 3/8 with the simple triple signatures: three beats, each an eighth note. 6/8 sits with the compound ones, where two dotted-quarter beats each hold three eighth notes.
How do I set a dotted quarter note tempo in 3/8?
Multiply it by three. A dotted quarter note is three eighth notes, a whole bar of 3/8, and the number here counts eighth notes: a mark of dotted quarter = 60 is 180 on this page, with the higher click once a bar.
Why can't I hear the metronome?
Start with the ring switch if this is a phone, then the volume, then a Bluetooth speaker or headphones that may have the sound. The dots need no sound: three light in turn, the first larger.