Niah: Private Period Tracker
Ovulation & Cycle, No Account
About
This app offers private period and cycle tracking, logging symptoms, mood, and providing accurate predictions for your next period and fertile window. It learns your rhythm, handles irregular cycles, and keeps all your data securely on your device.
What's New in Niah
1.6.0
October 8, 2026
Predictions from day one: • During setup, tell Niah when your last period started and your next period is predicted right away. Not sure? Skip it and log later. • Fewer, more useful reminders: the generic check-in nudge is gone. • "Share with partner" now ends your update with an App Store link, so your partner can get Niah too. • New in Settings › Rate & share: rate Niah on the App Store or share it with a friend. Sharing Niah sends an App Store link only, never your cycle data. • Niah is now available in Japanese (日本語). Everything still works offline, with no account.
MoreEvents
Log hot flashes and changing cycles. No account.
Oct 13, 2026 — Oct 24, 2026
Developer apps
FAQ
Does Niah have ads?
Niah is completely ad-free, allowing for an uninterrupted tracking experience.
How accurate are Niah's predictions?
Niah learns your unique cycle rhythm to provide honest predictions, even for irregular cycles, showing a range rather than a single date.
Is my data safe with Niah?
Yes, Niah prioritizes privacy. Your cycle data stays on your device unless you choose to export or share it, with encrypted backups available when you set a passphrase.
Can Niah track irregular cycles?
Absolutely. Niah is designed to handle irregular cycles gracefully, providing a range for predictions instead of assuming a consistent pattern.
Does Niah work offline?
Yes, Niah's tracking functionality works completely offline, meaning no internet connection is needed to log your data.
What devices does Niah support?
Niah is available on iPhone, iPod, and Apple Watch, with home-screen widgets for quick access.
Does Niah sync with Apple Health?
Yes, Niah supports two-way syncing with Apple Health, allowing you to integrate your cycle data with other health information.
Is Niah free to use?
Niah is completely free to download and use, with all fertility and insights features included without any subscriptions or unlocks.
