Petal: Period Calendar Tracker

Petal is a simple period calendar that keeps your cycle organized and your data private. Log your period in 3 seconds, see your next period, ovulation and fertile window at a glance — no account, no cloud, everything stays on your phone.

Why Petal?

🌸 Simple period tracker — open, tap, done. No clutter, no mandatory questions.
🔒 Truly private — no sign-up, no server. Your period data never leaves your device. Deleting the app deletes everything.
📅 Accurate cycle predictions — Petal weighs your recent cycles, so when your cycle shifts, the forecast shifts with it.
🥚 Ovulation & fertile window — see your ovulation day and fertile days on the calendar, with a clear pregnancy-chance status every day.
📱 Home screen widget — days until your next period, right on your home screen.

Track what matters

• Period start & end with one tap
• Flow level, symptoms (cramps, headache, bloating and more), mood and notes
• Intimacy and contraceptive pill intake
• Cycle history with average cycle length, period length and regularity

Made for your goal

Choose your mode — track your cycle, try to conceive, or avoid pregnancy — and Petal adapts what it shows you. Planning a baby? See your best fertile days. Avoiding pregnancy? Get clear caution on risky days, plus honest information about birth control reliability.

Gentle reminders

• Period coming up — a discreet heads-up 2 days before
• Ovulation and fertile window reminders
• Daily contraceptive pill reminder at your chosen time
• Notifications use neutral wording, so nothing personal shows on your lock screen

Insights that help

• Cycle history chart — spot changes in your menstrual cycle over time
• PMS and ovulation pain explained — know what your body is doing and when to see a doctor
• Care tips for cramps, fatigue, and other period symptoms

Your data, your control

Petal works fully offline. Export your data to a file anytime for your own backup, and import it on a new phone. No account to create, no password to forget, nothing stored on our servers — because there are none.

Whether you need a period tracker, an ovulation calculator, a fertility calendar or just a simple menstrual cycle diary — Petal keeps it simple, accurate and private.