Cycle
in full colour
connecting…
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Avg cycle
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Next period
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Next ovulation
What's happening in your body
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MonTueWedThuFriSatSun
Period
Predicted
Fertile window
Ovulation
Today
♥ Intimacy
Note
Tap any day to log period dates or an LH test
Your body, phase by phase
Trying to conceive? The best window is the 2–3 days before ovulation plus ovulation day. Having sex every 1–2 days through the fertile window gives the best odds. A positive LH (ovulation) test usually shows ~24–36h before ovulation — log it on the day and the app locks that cycle's prediction.
These predictions are estimates based on your logged dates and standard cycle biology — not medical advice. Calendar timing can't confirm ovulation on its own; LH tests make it sharper. If cycles are very irregular, or you've been trying 12 months (or 6 if over 35) without success, it's worth speaking with a doctor.
Your account
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Invite your partner: they open this link, sign in with their own account, and they're connected to this shared calendar — permanently, on all their devices.
Prediction settings
Ovulation → period. Default 14.
Google Calendar feed
Subscribe once — fertile & ovulation dates auto-update as you log periods (Google refreshes every several hours).
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Google Calendar (web): Other calendars → + → From URL → paste → Add.
Your cycle, by the numbers
Period history