Lune Line Cycle Tracker vs Sync

Lune Line is a private space for tracking your cycle and sharing what matters with people you trust. Log your period, follow updated predictions, and stay prepared with timely reminders. When you choose to connect with a partner, you can securely share your calendar, view calendars shared with you, and chat in one place. What you can do: • Track period dates • See your cycle day and estimated cycle stage • View predicted upcoming period dates that update as you log • Get reminders before your expected period and a check-in if you haven’t logged it • Share your calendar with people you choose • View calendars shared with you • Chat privately with connected partners • Manage sharing and access at any time • Add an optional PIN to protect access on your device Optional shop: • Browse period care, hygiene, comfort, and relationship products for individuals and couples Important: Lune Line provides tracking tools and cycle estimates. It does not provide medical advice and should not be used for contraception or pregnancy prevention. If you have health concerns, consult a qualified healthcare professional.

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.