VitalOS Cycle vs Lune Cycle Tracker

Track your cycle with complete privacy. Your data never leaves your device. VitalOS Cycle was built by a father for his daughter, because her health data deserves real protection - not just privacy policies. This is something different: an app where your most intimate health information never leaves your device. Completely free. No subscriptions. No ads. No data selling. FEATURES Period tracking with smart predictions Fertility window and ovulation estimates PMS tracking and alerts Daily symptom and mood logging Cycle history and statistics Intuitive calendar PRIVACY FIRST All data stored locally on your device No account required to use No data sold or shared - ever Zero-knowledge architecture No servers storing your cycle data Part of the VitalOS health platform. Optionally link with other VitalOS apps for a complete health picture - all while keeping your data private and under your control. Your body. Your data. Your choice. Terms of Use: https://healthai-backend-production-9451.up.railway.app/legal/cycle-terms Privacy Policy: https://healthai-backend-production-9451.up.railway.app/legal/cycle-privacy

Lune is a simple, private period tracker designed to help you understand your cycle without compromising your health data. Log your period dates and Lune automatically predicts your next period, fertile window, and ovulation day. The more cycles you log, the more accurate the predictions become. Features: • Track your menstrual cycle and predict future periods • See your fertile window and estimated ovulation day • Understand your cycle phase (menstrual, follicular, ovulation, luteal) • Gentle reminders 2 days before your next expected period • Beautiful, easy-to-read week strip showing where you are in your cycle Your privacy is the priority: Lune stores all data locally on your device only. No account required. No data is ever uploaded to a server, shared with third parties, sold, or used for advertising — ever. Uninstalling the app permanently deletes everything. Lune is not a medical device and does not provide medical advice. Cycle predictions are estimates based on your logged history.