Signal the END of an interval in a more incisive way

[ao2]

Hi,

first of all, is the app name a word-play on https://www.urbandictionary.com/define.php?term=batshit ?
Maybe it refers to crazy workouts? I wasn't sure because I am not a native English speaker.

Now to the feature request:

the 4 chirps which signal the end of an interval are OK, but it would be even better if some more incisive tone would be played when the interval actually ends.

This would be especially useful in a crowded room when the screen is not in sight, sometime I just can't hear the chirps.

Maybe this could be an optional alternative to the chirps, if having both the chirps and the ending sound is too much.

Ciao,
Antonio