Sync vs Cyca

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.

Optimized for iPhone Duo. Built with the latest SDK, the app fills the entire inner display and automatically adjusts its layout whether the device is folded or open. Log your period and Cyca estimates your next period, fertile window and ovulation day, all on one calm calendar that adjusts every time you log. A Daily Body Forecast reads where you are in your cycle — energy, mood, skin — and cramps, flow and moods take seconds to log. No account, no cloud: your data stays on your iPhone and works fully offline. YOUR DAILY BODY FORECAST Wake up to a caring daily reading of your energy, mood, skin, and comfort, based on where you are in your cycle — with kind suggestions to plan your day with ease. SMART, PERSONAL PREDICTIONS Cyca learns your unique rhythm to predict your next period, fertile window, and ovulation, and adapts every time you log. A CALENDAR THAT FEELS CALM See your whole cycle at a glance — period days, fertile window, and ovulation in soft, clear color. No clutter, just clarity. LOG IN SECONDS Record flow, cramps, moods, and notes effortlessly, and watch your personal patterns gently appear over time. PERSONAL RHYTHM & SMART PLANNER Personal Rhythm shows how your body tends to move through each phase. The Smart Planner highlights your best and gentlest days, so you can plan life around how you actually feel. DAILY CARE PLAN & PERIOD REMINDERS A daily Care Plan and a gentle heads-up before your period or PMS help you plan ahead and go a little easier on yourself. PRIVATE BY DESIGN Your cycle is yours alone. Cyca has no servers and no account — your data never leaves your device, and the app works fully offline. Privacy isn't a setting here; it's the whole design. YOURS FOREVER, NO SUBSCRIPTION Track today and your period for free. Unlock Cyca Pro once for future predictions, Personal Rhythm, the Smart Planner, full calendar history, and deeper personalization — a single lifetime purchase, never a subscription. Cyca provides wellness and planning estimates and is not a medical device or a form of contraception. Optimized for iPhone Duo.