Cycle predictions
Track My Flow estimates your next period and current cycle phase from the date of your last period and your average cycle length. The more you log, the sharper the predictions become.
How it works
A typical cycle lasts 21–35 days. We use your last period start date and cycle length to project the next period, count the day you're on, and identify the current phase (menstrual, follicular, ovulatory, luteal).
The four phases
Menstrual: the period itself, days 1–5. Follicular: rising estrogen, energy building. Ovulatory: peak fertility, ~day 14. Luteal: progesterone rises, PMS may appear before the next period.
Making predictions more accurate
Log daily flow, symptoms, and mood. Over 2–3 cycles the app learns your personal average so predictions adjust to you — not a textbook 28-day standard.