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Nadi vs Clue: which fits how you plan?
Clue has earned real respect for its science-first approach to period tracking. Nadi shares that respect for evidence — and takes a completely different route: your cycle phases, inside the calendar you already plan in.
The short version
Clue is a standalone period tracking app, known for its evidence-led approach, its published research collaborations and its careful language. You log in the app, and you read your cycle in the app. Nadi starts from a different observation: the place most of us actually plan our lives is a calendar. So Nadi estimates your four phases — menstrual, follicular, ovulatory and luteal — and writes them into Google or Apple Calendar, where your commitments already live. No new app, no daily logging.
Side by side
| What matters | Nadi | Clue |
|---|---|---|
| Where you see your cycle | Inside the Google or Apple calendar you already use | Inside the Clue app |
| New app to download | No — set up once on the web, then live in your calendar | Yes — a standalone mobile app |
| Core focus | Planning work and life across all four phases | Cycle tracking, logging and cycle science education |
| Daily logging | None required — three inputs at setup | Encouraged; the app refines with what you log |
| Evidence culture | Method published in plain English; estimates framed honestly | Strong — science-led content and research partnerships |
| Workplace education | Yes — sessions and support for teams | Not its focus |
We aim to be fair: Clue's features change over time, and details here are correct as far as we know at the time of writing. Always check Clue's own site for current features and pricing.
Where Clue is the better fit
If you want to log daily observations, dig into cycle science content, or keep a detailed personal record inside a dedicated app, Clue does that well — and its scientific culture is genuinely admirable.
Where Nadi is the better fit
If the app you would faithfully log into does not exist because you live in your calendar, Nadi meets you there. Your estimated phases appear alongside your meetings, weeks ahead, built from a method we publish openly — and framed honestly: Nadi is a planning tool, not an ovulation predictor or contraceptive method.
Add your cycle to your calendarCompare more options in our round-up of period trackers that sync with your calendar, or start with the four cycle phases.