I didnt even really get to use the app before it malfunctioned and totally started wigging out on my phone. Something definitely needs to be fixed. I tried to do a practice run with the watch and my phone and 1- it doesnt let you pause or start the timer on the watch, which in my opinion totally defeats the purpose of using it on your watch and 2- the watch doesnt vibrate or let you know the interval is done. Please fix!!
Critalann about Intervals Pro: HIIT Timer, v2.2.0