Period and cycle tracker
Your cycle, gently understood.
Petalune predicts your period and fertile days, shows what your hormones are doing today, and lets you share your cycle with a partner. Private by design: no ads, no analytics, never sold.
The iPhone app is on its way. Petalune works in Safari today, with the same account.
Free on Android and the web. iPhone app coming soon.
Fertile window
3rdday
Ovulation in 3 days
A sample cycle. Yours fills in as you log.
Everything about your cycle, in one calm place
Made for tracking your own cycle, trying to conceive, or simply understanding your body better.
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Predictions you can read
A cycle dial shows where you are today, when your period is due and your fertile window, and gets sharper as you log.
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Log a day in a tap
Tap any day on the calendar to set its flow, mark when a period started or ended, or add symptoms and mood.
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Hormones and phases
See how estrogen, progesterone, LH and FSH typically move across your cycle, and what each phase can feel like.
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Share with a partner
Send a link and your partner sees your phase, what's coming and how to help. You choose what else they see.
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Body and health sync
Track weight, water, sleep and basal temperature, or bring them in from Health Connect on Android.
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Gentle reminders
A heads-up before your period, during your fertile window or to log your day, only the ones you switch on.
Meet Luna, your cycle buddy
Ask Luna about cramps, cravings, sleep or a day on your calendar, and get a warm, plain answer that knows where you are in your cycle. Luna points you to Petalune's Learn guides and tells you when it's worth talking to a doctor. Included with a free account.
Luna isn't a doctor and doesn't give diagnoses. Data from health apps is never sent to it.
Private by design
Your cycle is personal. Petalune keeps what you log for one reason: to show it back to you.
Read the privacy policy- No ads, no analytics and no tracking software in the apps or on the web.
- Your data is never sold or shared for marketing.
- Download everything or delete your account from Account, at any time.
- Values from Apple Health or Health Connect stay out of Luna's conversations.
- A partner sees your phase and predictions, plus only the extras you pick. Stop sharing whenever you like.
Start in under a minute
Tell Petalune when your last period started and it does the rest. Try it as a guest, no email needed.
The iPhone app is on its way. Petalune works in Safari today, with the same account.
Free on Android and the web. iPhone app coming soon.