Period & Cycle Diary: Private

A period and cycle diary that asks nothing of you first - no account, no sign-up, no ads.

- One tap to record
Log when your period starts and ends, how heavy it is, and how you're feeling, from a simple calendar.

- A next-period estimate, shown as a range
Once you've recorded 3 cycles, the app shows an estimated range for your next period, calculated from your own past cycles - never a single date presented as certain.

- Calendar that tells recorded days from estimated days apart
Recorded days and the estimated range are always shown differently, so you never mistake one for the other.

- A private space to reflect
See your cycle length over time and how much it varies. Free shows your most recent 6 cycles; a one-time purchase unlocks your full history.

Free forever: recording, calendar, the next-period estimate, app lock, export/import, and reminders. A one-time purchase unlocks unlimited custom tags and your full cycle history.

- Who it is for
People who want to start tracking a period with no account to create.
People who like to jot down start and end dates, flow and how they feel on a simple calendar.
People who want a heads-up for the next period shown as a range, not a promise.
People who want a lock on the app so nobody else sees their diary.

- A typical week with the app
1. On the day your period starts, tap the calendar and log the start date.
2. When it ends, log the end date, and add the flow and how you feel if you like.
3. After 3 recorded cycles, the app shows an estimated range for the next one.
4. Open the reflection view to see how long your cycles are and how much they vary.
5. Before changing phones, use export to save your records, and import them on the new one.

- Common questions
Q. Do I need an account?
A. No. There is no account and no sign-up. Open the app and start logging.
Q. How reliable is the next-period estimate?
A. It is calculated from your own past cycles and shown as a range. The app never presents one date as certain.
Q. Does anything get sent anywhere?
A. No. Nothing you record leaves this device.
Q. What is free?
A. Recording, the calendar, the next-period estimate, app lock, export/import and reminders are free forever. The one-time purchase unlocks unlimited custom tags and your full cycle history.
Q. Can I use it for birth control or to find out if I can get pregnant?
A. No. It is not designed for either purpose.

- Tips for sticking with it
You do not have to log every day. The start and end dates are enough.
A quick note on how you feel is fine, even one word.
If symptoms keep bothering you, your records can help when you talk to a doctor.

- Completely private
No account, no ads, no tracking, no internet connection required. Nothing you record is ever sent anywhere - it all stays on this device. Add an app lock (face or fingerprint unlock, or your screen lock) for extra privacy.
Available in 9 languages: English, Japanese, German, French, Spanish, Korean, Traditional Chinese, Vietnamese and Portuguese.

This app is not for contraception, and does not tell you if or when you can get pregnant. If you have symptoms that concern you, please talk to a doctor.