Unreliable
This app has issues when I want to run it in the background and have other things, like music or a podcast going at the same time. If I start music and then start the intervals, it stops my music. Moreover, if Im listening to something else, the interval timer doesnt always sound. As I was looking for an interval app to use while running, this proved very inconvenient. I do twang to be messing around with the timer while I run or making sure its actually on once Ive started it. I just want it to work; for me, this one didnt.
OutsideIsBetter about
Simple Interval Timer