Huge battery drain! – Tempo - Metronome with Setlist Review

I used to love this metronome app. Unfortunately, I recently noticed it is running in the background and drinking significant amounts of battery. I have not run the metronome since Wednesday yet it is claiming 13 hrs of background activity in the past 24 hours, or 28% of my total battery usage. I need a metronome app, but not if it's going to behave like this one does now!
Review by Dust Boogie on Tempo - Metronome with Setlist.