VitalOS Cycle

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