Easy to use and read
This is a great app. You can share with your significant other, and add notes about different things on your cycle. I like that I can scroll through the calendar year and see when Im getting my period. I also like the period log, because I can see at a glance how long each of my cycles was. It requires you to put it in accurately of course, but great free app!
Jysquared about
Cycles: Period & Cycle Tracker, v3.1.2