Best App for interval training

I downloaded this app plus about 5 others. Deleted all other apps but this one. Easy to set timers for my 3 minutes heavy bag boxing rounds, which include 1 minute rests. I love the countdown voice and the three bells at the end of each round. Even though I downloaded for free, I paid 99¢ to get the ads removed. However, the app functions just as well with the ads. Dont waste your time on other apps - get this one.

TonyTellum about Gymboss Interval Timer, v2.1.1