Tide: Period & Cycle Calendar

Private period, ovulation & cycle tracker. Your data stays on your phone.

Tide moves with your body's natural rhythm — a calm, private period and cycle tracker that predicts your period, ovulation, and fertile window, and keeps every bit of your data on your phone.

No account. No cloud. No sign-up. Ever.

🌙 PERIOD & CYCLE TRACKER
Log your period and symptoms in seconds. Tide learns your unique cycle and predicts your next period with honest confidence levels — never false precision.
- Period calendar with a clear cycle view
- Next-period and PMS predictions
- Track flow, mood, cramps, energy, sleep and more

💧 OVULATION & FERTILITY
Use Tide as an ovulation calculator to find your fertile window.
- Ovulation and fertile-window predictions
- Add basal body temperature (BBT) and cervical mucus for accuracy
- Built for trying to conceive

💜 FOR EVERY STAGE
Whether you're tracking your cycle, trying to get pregnant, pregnant, or navigating perimenopause, Tide adapts to you.
- Pregnancy tracker, week by week
- Perimenopause symptom tracking
- One app, every life stage

✨ UNDERSTAND YOUR PATTERNS
Tide connects your symptoms to your cycle, so you learn why you feel the way you do — days before it happens.

🔒 TRULY PRIVATE
Your period data is sensitive. Tide stores everything locally on your device — no cloud, no account, nothing shared. Export or delete your data anytime.

🔔 GENTLE REMINDERS
Get a heads-up before your period or fertile window so you're never caught off guard.

Tide is not a contraceptive and not a diagnostic tool. Predictions are for information only — always consult a qualified professional for medical decisions.