Periodly: Period Tracker

Your cycle data is stored on your phone, not in the cloud. No account, no ads, no trackers — just a calm, private place to track your cycle.

Track your period, log how you feel, and see what's coming next — without handing your data to anyone.

Periodly keeps every cycle, symptom and note in a database on your own phone. There is no account to create, no cloud sync, and no advertising or analytics SDKs anywhere in the app.

WHAT YOU CAN DO

• See where you are — a single ring shows your current phase, the day of your cycle, and how far along you are • Get estimates for your next period, your ovulation window and your fertile days • Read a month at a glance — colour-coded days separate logged periods from predictions, fertile days from ovulation • Fix a mistake fast — tap the first day, drag to the last, save • Log as much or as little as you like — flow, discharge, skin and hair, mood, pain and severity, sleep, energy, plus a free-text note • Track 43 symptoms across 5 categories, with your recent ones always one tap away • Set reminders on your terms — period start, period end, logging, fertility and ovulation, each with its own timing and a message you can rewrite • Add birth control pill reminders with three regimen types, and water reminders on your own schedule • Use the app in 8 languages

HOW PREDICTIONS WORK

Periodly averages the gaps between your last six periods and keeps that average between 21 and 50 days. Ovulation is estimated using a 14-day luteal phase, and the fertile window runs from five days before to one day after. Every prediction carries a confidence level based on how regular your cycles have been.

If you tell Periodly you're tracking for birth control, or that your cycles are irregular, fertility and ovulation estimates are hidden rather than guessed at.

PRIVACY, NOT AS A PROMISE

• Cycles, logs and settings live in an on-device database • There is no backend to send them to, and no login • Settings → Clear All Data erases everything from the device permanently • The only exception: if you subscribe, the purchase is handled by the App Store and its subscription provider, which sees purchase status — never your cycle, symptom or health data

FREE AND PRO

Tracking, logging, the calendar and every reminder are free.

Periodly Pro unlocks the Analytics tab: cycle regularity, your last three cycles compared, PMS onset detection from your own symptom history, symptom and mood patterns, prediction accuracy, and month-by-month cycle history.

Pro is an auto-renewing subscription. Prices are shown in the app before you buy and vary by region. Payment is charged to your Apple Account at confirmation of purchase. The subscription renews automatically unless auto-renew is turned off at least 24 hours before the end of the current period. You can manage or cancel it any time in your Apple Account settings. Where a free trial is offered, any unused portion is forfeited if you buy a subscription.

IMPORTANT

Periodly is not medical advice, a diagnosis, or a contraceptive. Predictions are estimates based on your entries and general cycle assumptions, and they can be wrong. Talk to a healthcare professional before making decisions about your health, contraception or fertility.

Privacy Policy: https://periodlytracker.vercel.app/en/privacy Terms of Use: https://periodlytracker.vercel.app/en/terms EULA (Apple Standard License Agreement): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Questions: supportperiodtracker@gmail.com