Luna: Private Period Tracker
Cycle, Ovulation & Fertility
About
This app provides private, offline menstrual cycle and ovulation tracking. It forecasts fertile windows and period start dates using on-device algorithms, with features for symptom logging and secure partner syncing. All data is encrypted and stored locally, ensuring user privacy.
What's New in Luna
2.0.16
October 6, 2026
What’s New in This Version: • 100% On-Device Privacy: Your intimate cycle data never leaves your iPhone. • Intelligent Cycle & Fertile Window Predictions: Accurate planning without cloud tracking. • Fast Two-Tap Logging: Track flow, symptoms, and moods in seconds without bloated surveys. • Clinician PDF Reports: Multi-page health summaries ready for your doctor appointments. • Encrypted Partner Sync: Private QR-code sharing without exposing personal notes.
MoreSubscriptions & In-App Purchases
Luna Premium Monthly
Full access to health insights & cycle tracking
Developer apps
FAQ
What is Luna?
Luna is a private, offline-first menstrual cycle, period, and ovulation tracker. It focuses on keeping your intimate health data exclusively on your device, without requiring an account or uploading to remote servers.
Does Luna have ads?
No, Luna does not contain any third-party ad networks, analytics trackers, or data brokers. It is designed to be completely ad-free and privacy-focused.
How accurate are Luna's predictions?
Luna uses on-device algorithmic estimates for period start dates, fertile windows, and ovulation phases. These predictions are adaptive and learn from your natural patterns, but should not be used as a form of birth control.
Can I share my data with my partner using Luna?
Yes, Luna offers a secure partner sync feature. It uses end-to-end encrypted QR-code pairing to share only the cycle phases and dates you choose, without compromising your data sovereignty.
What kind of health data can I log in Luna?
You can log flow intensity, symptoms like cramps, headaches, and mood swings, as well as wellness notes, intimacy, energy, sleep, and custom daily check-ins.
Can I export my health data from Luna?
Yes, Luna allows you to export multi-page, formatted cycle health summaries for your healthcare provider. These reports include cycle variability metrics, symptom frequency distributions, and timeline charts.
What devices does Luna support?
Luna is available for iPhone, iPad, and iPod. It features biometric app lock (Face ID / Touch ID) and discrete app icon options for added privacy.
How often is Luna updated?
The latest version of Luna is 2.0.12, which was last updated on September 18, 2026. Updates typically focus on enhancing privacy features and improving forecasting accuracy.
