Period Tracker

Period Tracker is a health & fitness app by GP International LLC with 10,000,000+ downloads (about 24M estimated). +6.4K installs in the last 7 days. Rated 4.4 from 358K ratings. Released Oct 7, 2011. Install growth, rank history, SDKs and ad networks.

From the store listing: “Period Tracker is the easiest way to track your periods! * Press a button at the start of your period every month. Period Tracker logs your dates and calculates the average of your past 3 months' menstrual cycles to predict the start date of your next period. * View your current and future period dates, ovulation…”