The sound

[davidpiano]

This app is one of the best metronomes I've ever had (simple, convenient, accurate), so I continue to use it regularly. But the sound would be much better if it was a realistic mechanical tick, not a beep tone as it is now. The problem is even more noticeable when using "emphasize first beat", because playing the same beep an octave higher serves to reinforce the sense of the pitch. This is irritating when playing music, because the beep is out of tune with what's being played.

A mechanical tick should just replace the current sound; there doesn't need to be a new preference, nobody needs a beep IMO. "Emphasize first beat" should be the same mechanical tick with the volume increased.

The electro-mechanical metronomes made by the Franz company had an excellent sound, but they were discontinued long ago, many of them are broken now, and they would need highly skilled repair that is now very rare. You can hear recordings of them by searching Franz metronome on popular video sites. (I don't mean you must use that exact sound, just it's a good example of the right kind of sound for a metronome.)