Period tracker and cycle calendar

Mark your period, tick symptoms and see when the next one is likely to start.

Coming soonAndroid
Scan with your phone camera to open the App Store.
  • Free
  • Choose the trackers that fit your day.
  • Create an account to start your journal.
Period tracker

How it works

Period tracking in three steps

  1. Tap when your period starts

    Mark the day it starts and the day it ends with one tap each.

  2. Note your symptoms

    Pick any of six common symptoms you have that day, like cramps, headache or bloating.

  3. See your next period

    yuuvii works out an estimated range for your next period from your recent cycles.

What's in the period tracker

  • Period days in a tap

    Mark the start and end of each period. Your average cycle comes from your last six cycles.

  • Today's symptoms

    Cramps, Headache, Bloating, Fatigue, Mood swings, Breast tenderness, Back pain, Nausea, Cravings, Acne, Discharge.

  • Next period estimate

    Log your period days and symptoms, and see an estimate for your next period.

  • Your mood before your period

    After two full cycles, a card compares your mood in the five days before a period with the rest of the month.

Privacy

Your journal, mood, cycle and tracker records, including saved step counts, are stored on your device. When account backup is available and you are signed in, the app also sends an encrypted copy to our servers to restore and merge your records.

Privacy policy

Blog

Questions about your period

All periods articles (18)
Go to the blog

Questions

Period tracker is part of your yuuvii account. Choose it from your trackers.

Your journal, mood, cycle and tracker records, including saved step counts, are stored on your device. When account backup is available and you are signed in, the app also sends an encrypted copy to our servers to restore and merge your records.

No. yuuvii estimates your next period only. It does not calculate an ovulation or fertility window, and it cannot be used for contraception or to plan a pregnancy.

It is the average of your own recent cycles, shown as a range. The more regular your cycle, the closer it gets. If your cycle changes a lot, talk to a doctor.

Android is coming soon. You can download yuuvii for iPhone from the App Store.

The estimate is not for contraception. yuuvii is not a medical device and does not diagnose or treat.

Last updated: Nov 12, 2026 · How we write

Keep your period calendar in yuuvii

Tap once when your period starts; the next estimate, your symptoms and your mood live in one place. Your entries stay on your phone.

Coming soonAndroid
Scan with your phone camera to open the App Store.

In the same app

Every tracker is optional. Turn on the ones you need, all in one app.