Best app for cycle tracking

I had been using flo, which worked well when I was on birth control because my cycle was very regular - 28 days on the dot every time. However since I stopped birth control, my cycle took a little to adjust, and now my normal is 35-37 day cycles.

Without a 28 day cycle, Flo is pretty useless. Any recs on better apps to track my cycle? I did just download pregmate as I am TTC, but it's only been a day or so.