Sync vs Lune

Sync Period tracks cycles locally and supports private sharing with a partner or friend. Log periods, symptoms, moods, and notes; view your calendar and pattern summaries; set optional reminders; and import supported Flo, Clue, Drip, or generic CSV data after reviewing what Sync can recognize. Your cycle history is encrypted on your device. Private predictions adapt to your recent cycle history and confirmed corrections entirely on your device. Sync shows a likely-start window and confidence level, learns recurring pre-period patterns, and can use an enabled BBT signal or positive ovulation test without uploading those health details. Predictions become more cautious when history is sparse or variable. Partner sharing is optional and off by default. You choose which supported cycle details to share. Updates are end-to-end encrypted and require the complete private invite to open. Each encrypted relay update expires after no more than 30 days; active sharing renews that rolling expiration when a new update is published. Recent physical symptoms and flow, sex-drive and intimacy check-ins, and moods are three separate opt-ins that can each be turned off again. Intimate sharing is off by default and never indicates consent. Discharge, medications, written notes, and other sexual details remain private. Sync Period has no ads, no behavioral analytics SDKs, and no required account. You can export a private backup or permanently delete local app data at any time. Cycle predictions and pattern summaries are estimates. Sync Period does not provide diagnosis, contraception, or medical advice.

Lune is a beautifully designed cycle tracker that connects your menstrual cycle to the rhythm of the moon. Track your period, log how you feel, and watch your cycle unfold across a living, celestial interface. Lune blends accurate cycle tracking with the lunar calendar—so you can see your body's rhythm in a whole new light. PRIVATE BY DESIGN Your data stays on your device. No accounts. No cloud. No tracking. Lune was built so your most personal information never leaves your phone. TRACK WHAT MATTERS - Log periods, symptoms, and moods in seconds - See predictions for your next period and fertile window - Explore your full cycle history on a calendar - Understand your patterns with clear, personal insights YOUR CYCLE, IN THE LIGHT OF THE MOON Lune maps your cycle against the lunar phases, revealing how your rhythm moves through the month. A unique Moon Clock shows where you are at a glance. A SPACE THAT FEELS LIKE YOURS Choose from a collection of beautiful visual themes ("skins") that shift with your cycle phase. Lune is calm, immersive, and made to be a space you actually enjoy returning to. LUNE PREMIUM Unlock the full experience with Lune Premium: - Every visual theme in the collection - The complete chronobiology content library - Full journal and cycle history - Deeper insights and smart predictions Lune Premium is an auto-renewing annual subscription ($29.99/year) with a 7-day free trial. Payment is charged to your Apple Account. Your subscription automatically renews unless canceled at least 24 hours before the end of the current period. Manage or cancel anytime in your Apple Account settings. Privacy Policy: https://mylunecycle.com/privacy Terms of Use: https://mylunecycle.com/terms