Your Cycle, Your Privacy

Track your period, ovulation, and fertility windows with complete privacy. Available on iOS and Android. No accounts. No cloud. No data sharing.

Download on App Store
100% Local Storage
On-Device ML
No Account Required

Features

Cycle Tracking

Log period start/end dates, flow levels, and symptoms with an intuitive interface.

Smart Predictions

On-device machine learning predicts your cycle, ovulation, and fertility windows.

Calendar View

Visual calendar showing your period, fertile window, and predicted ovulation day.

BBT & Mucus Tracking

Track basal body temperature and cervical mucus to improve prediction accuracy.

Insights

View cycle regularity, mood trends, and symptom patterns over time.

Backup & Export

Export your data anytime. Your data belongs to you.

Privacy First

Luna is built on a simple principle: your health data is yours and yours alone. We don't believe in tracking, profiling, or monetizing your personal information.

  • No cloud storage — All data stays on your device in a local SQLite database
  • No accounts required — Use the app immediately without signing up
  • No data sharing — We never sell, rent, or share your data
  • No analytics — We don't track how you use the app
  • On-device ML — Predictions happen locally, not on our servers
Your Device
All data stored locally
No Cloud
No Tracking
No Accounts

Download Luna

Available on iOS and Android

Download on the App Store Get it on Google Play

iOS 15.0+ • Android 8.0+