Actually good contraction ap?

I am 35+2 and having irregular contractions. I downloaded a contraction timing ap and it suuuuucccckkks because the idea is that when you have a contraction you open the app and start a timer and when it's over you stop it. Well.. if my phone is anywhere other than in my hand or I am in any other screen than with my finger hovering over the start timer than the contraction is nearly over or completely over by the time I start my timer.

Has anyone found an AP that is actually useful or that has more/better /fun features?

Thanks.