Tap any day to write in your diary. Predictions are estimates from your own history and aren’t a form of contraception.
Everything here is worked out from your diary. The more days you log, the clearer it gets.
Average pain score on each day of your period.
Gentle, practical ideas for the tougher days, plus trusted places to read more.
Your Patterns page makes a handy summary to show at an appointment.
Petal uses your cycle trends to give you a heads-up before your next period.
Adds your next six predicted periods to your calendar, each with an alert at 9am. This is the most reliable way to get reminders when Petal is closed. Re-add after a few cycles so the dates stay up to date.
Used for predictions until you’ve logged two full cycles.
Your diary lives only on this phone. Save a backup now and then, especially before changing phones.