From a few taps to a clear forecast
FlowKeeper turns the days you log into honest predictions — entirely on your device. Here's the whole journey, step by step.
Log your days
Tap any day on the calendar to mark your period and record how you feel.
- Flow — light, medium, or heavy
- Symptoms, mood & energy — cramps, headache, and more
- Pain level & notes — whatever you want to remember
Just a few logged cycles is enough for FlowKeeper to start predicting.
FlowKeeper learns your rhythm
Behind the scenes, a robust statistical model studies your history — built to handle real life, not a textbook.
Each older cycle counts a little less than the one after it.
Stay one step ahead
See what's coming — and choose to be reminded before it arrives.
- Predicted period, ovulation & fertile window on your calendar
- A clear high / medium / low confidence label on every estimate — tap it to see what it means
- Optional reminders before your period or fertile window
All reminders are scheduled locally on your device — they never pass through a server.
Next period
Mon, Jul 6
Likely to start: Jul 5 – Jul 7
Curious about the actual math?
We've written the full, formula-by-formula explanation of how the next-cycle estimate is computed — with worked examples and graphs.