Most apps will "learn" about the length of your cycle over time to best predict when your next period will occur.Of the many highly rated period tracking apps available, our favorite is Clue (free, i Phone, Android), which bills itself as "confident, scientific — and not pink." Clue's half-atom, half-flower icon doesn't scream "period tracker," making it a discreet addition to your home screen.Clue allows you to enter that information, but beware — its algorithm does not currently include this cervical mucus data when calculating your fertility window.Users can set reminders to take birth control pills, change hormonal rings or patches, or take their temperature for fertility tracking."Abstinence mode" lets you hide the icons for intimacy and ovulation for privacy's sake.Overall, some users may be turned off by this app's flowery, perhaps teenaged look, but Period Tracker Lite gets the job done.The app lives up to its promise of no pink with a gray, red and blue color scheme.It eschews emoji-style icons for more classic illustrations, though they are not without a sense of humor: The symbol for sex is a reclining person.
Some of these apps are simple calendars; others have space for tracking cervical mucus and body temperature to help women estimate when they are ovulating.
Academic citations are included for all of the educational information contained in Clue.
Users can back up their information to other devices via email or sign up for an account for automatic access to data.
This app has much of the same functionality as Clue, and appears on your home screen with the label "P Tracker Lite." Tap the home screen to record your period's beginning and end, or go to calendar view and tap a date to manually enter previous periods.
The calendar will automatically estimate your fertility window and mark those days with green dots, and a flower appears on the estimated day of ovulation.