Very useful

I have been using this app fir the last 4 months, and can only say good things about it. The interface is easy to use, I can add as much or as little info as I see fit. I really like the email notification system for approaching periods.
I can highly recommend this app for those looking for an easy to use system for keeping track of and predicting your period.

cechap about iPeriod Period Tracker +, v4.8