Calendar sync
A period tracker that syncs with Google Calendar
Most period trackers keep your cycle locked in their own app. If what you actually want is your cycle inside Google Calendar — next to the meetings, deadlines and plans it affects — that is precisely what Nadi is built for.
Not another app — an overlay
Nadi takes the information a period tracker holds and puts it where you plan. From three inputs — your last period start date, average cycle length and average period length — it maps your four phases and writes them into a dedicated calendar in your Google account. Your period is there, and so are the follicular, ovulatory and luteal phases around it, projected weeks and months ahead.
What makes this different from a tracking app
- Nothing new to open — your phases appear in the Google Calendar you already check.
- No daily logging — three inputs at setup, updated only when your cycle changes.
- All four phases, not just a period prediction — because energy, focus and capacity shift across the whole cycle.
- The narrowest Google permission available (calendar.app.created): Nadi can only see the calendar it creates, never your other events.
- A published method and honest framing — estimates, stated as estimates.
Getting started takes minutes
- Answer three questions at my.nadi.health.
- Connect Google Calendar — Nadi creates its own dedicated calendar there.
- Plan your week with your phases in view.
The honest small print
Nadi is a planning tool, not an ovulation predictor or contraceptive method; no calendar-based approach can pinpoint the exact day of ovulation. If you are comparing tools, our round-up of period trackers that sync with your calendar covers the field fairly — including Flo, Clue and The Agenda. For step-by-step setup, see adding your period to Google Calendar or syncing your cycle with Apple Calendar. And if you are new to phase-based planning, start with the four cycle phases.