Know what's coming.
Keep it private.
Your next period, worked out from your own cycle and said the way a friend would say it: early, plainly, no drama.
Predictions you can plan around
Your next period and fertile window, computed from the cycles you log, with a give-or-take instead of false precision. Every period you log makes it sharper.
Trying, or expecting
A wider fertile window and conceive days when you are trying, and a pregnancy mode with week-by-week progress, a due date and checklists once you are.
Don't even open the app
Home Screen and Lock Screen widgets, a Control Center button to log a period, and one calm notification at the time you choose.
Not ours, and not an advertiser's.
- We don't run ads.
- We don't sell your data.
- Your health data never goes to an ad platform.
- Delete your account and your health data from the app, any time.
- Everyday tracking is free.
Everyday tracking is free. Plus goes further.
Daily briefing
A short, AI-written note each morning about where you are in your cycle, with the disclaimer it deserves.
Your whole history
Every past cycle, 12 months of predictions on the calendar, and a doctor report you can hand over at an appointment.
Simple terms
Monthly or yearly. Try Plus free with the yearly plan (eligible new subscribers). Prices are shown in the app in your local currency. Cancel anytime in your Apple subscription settings.
Plain answers about your cycle.
Menstrual cycle
How the menstrual cycle works, its phases, and what a typical cycle length looks like.
Periods
Period length, flow, timing and the everyday questions that come with them.
Ovulation & fertile window
When ovulation happens, how the fertile window is estimated, and the signs people notice.
PMS & symptoms
Premenstrual symptoms, cramps, mood and energy changes across the cycle.
Trying to conceive
Timing, the fertile window and what to know when you are trying to get pregnant.
Pregnancy
Due dates, pregnancy weeks and trimesters, and the early weeks of pregnancy.
Health data privacy
What period tracking apps collect, who can see it, and how to keep your health data private.
Work it out in a few seconds.
Period calculator
Estimate your next six periods, with start and end dates, from your last period, cycle length and period length.
Ovulation calculator
Estimate your ovulation day (about 14 days before your next period) and six-day fertile window for the next three cycles.
Due date calculator
Estimate a due date, current pregnancy week and trimester from your last period (280 days) or conception date (266 days).
Cycle length calculator
Work out your average cycle length, shortest and longest cycle, and how much it varies from your period start dates.
Tuesday, give or take.