Lunella: Period Tracker

Lunella is a beautifully simple period and cycle tracker that keeps everything on your device. No internet. No accounts. No tracking. Just you and your cycle.

Most period apps send your most personal data to the cloud. Lunella takes the opposite approach: it has no internet permission at all, so your information physically cannot leave your phone. You can verify this yourself in your app permissions.

PRIVATE BY DESIGN
- Fully offline — the app requests no network access whatsoever
- All your data is encrypted and stored only on your device
- Protected by a PIN you set
- No accounts, no sign-up, no analytics, no ads, no third-party tracking
- The app locks itself when you switch away and stays hidden in the app switcher

TRACK YOUR CYCLE
- Log your period with a tap
- Clear monthly calendar with your period, fertile window, and predicted dates
- Daily logs for symptoms and moods
- Predictions that learn from your own history, right on your device
- Edit or remove any entry, anytime

UNDERSTAND YOUR PATTERNS
- See your average cycle and period length
- Track how much your cycle varies
- Discover your most common symptoms and moods
- All calculated from your own data, never shared

FERTILITY INSIGHTS
- Estimated fertile window and ovulation day
- Shown simply as Low, Medium, or High likelihood
- Always with a clear reminder: these are estimates, not medical advice, and not a form of birth control
- For health decisions, please consult a qualified professional

YOURS TO CONTROL
- Optional reminders — local notifications, off by default, nothing leaves your device
- Encrypted backups locked with a passphrase only you know (Argon2id + AES-256)
- Move your data to a new phone or your own storage — without the passphrase, it's unreadable
- Change your PIN or language anytime

A ONE-TIME PURCHASE
Pay once and Lunella is yours. No subscriptions. No ads. No in-app purchases. No surprises.

AVAILABLE IN 7 LANGUAGES
English, French, Italian, German, Spanish, Portuguese, and Turkish.

Your cycle is personal. Lunella keeps it that way — private, offline, and beautifully simple.

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Note: Lunella provides cycle predictions and fertility estimates based on your logged history. These are estimates to help you understand your cycle and are not medical advice or a method of contraception. Always consult a healthcare professional for medical concerns or family planning.