Best contraction tracking app?

[ThinkPinkStink]

Hello!

I'm 38.5 wks and just about ready to birth this little beasty (though aware she may 3.5 weeks away yet).

I'm eager to spend as little time as poss in hosp, so want to make sure I leave for hosp at the right time.

Did any of you use an app to track contractions? If so, which would you recommend?

Thanks in advance.

To be honest I had about three downloaded and they were all pretty much the same, I had a pregnancy app which included it. All it does is time length and how far apart, so any of them will do the job :)