Privacy Policy

Last updated: 22 August 2026

Your cycle data stays on your device

Dates, logs, symptoms and the forecasts derived from them are stored in your device's local storage. There is no account, no sign-up, and no server they sync to. We cannot see them either.

Notifications are built on your device

The forecast and the notifications are computed on the device. The text of a notification is never routed through a server of ours and contains nothing that leaves the phone.

What does leave: purchases

The purchase is made once through Apple, and verified with a service called RevenueCat. Verifying it sends technical purchase identifiers and an anonymous device id to the app store and to RevenueCat. That data contains no cycle information and does not identify you by name.

What does leave: crash reports

If the app crashes, an anonymous technical report is sent to a service called Sentry so we can fix it. It describes the device and OS version. It contains no cycle data.

What does leave: product measurement

To understand which screens help and which do not, we use a service called PostHog. It receives technical events only, such as "log saved" or "purchase completed". No cycle date, symptom, phase or forecast value is ever sent, neither as the content of an event nor as its name.

What does leave: install attribution

To know which ad or campaign brought you here, we use an attribution service called AppsFlyer. It receives device identifiers and technical information about the install. This is sharing data with a third party for marketing purposes. If the service asks for your device's advertising identifier, your operating system will ask your permission first, and the app works exactly the same if you decline.

What does leave: aggregate usage data

If you have allowed the app store to share analytics, we see anonymous aggregate reports: how many downloads, how many crashes, and so on. No individual can be identified from them. You can turn this off in your device settings.

This website

The marketing site measures traffic with PostHog, so we can tell which pages work. It is cookieless: the identifier lives in the browser tab and is gone when you close it, which is why there is no consent banner and nothing to follow you between visits. The site handles no cycle data at all.

No ads, and nothing sold

We show no advertising inside the app and sell your data to nobody. We do measure where installs came from, as described in the attribution section above.

Deletion

You delete your data from inside the app, on the "Your data" screen. It is immediate and irreversible. Deleting the app also removes all local data. Because we hold no copy, there is nothing to restore from.

Age

The app is intended for ages 13 and up. If you are under 18, read this policy with an adult.

Your rights

Under Israel's Protection of Privacy Law, 5741-1981, you have the right to review and correct information held about you. Because cycle data is held only on your device, reviewing and deleting it happens in the app. For purchase and measurement data held by Apple, RevenueCat, PostHog and AppsFlyer, contact us and we will help.

Changes to this policy

If the policy changes we will update the date at the top. A material change will also be shown inside the app.

Contact

Any privacy question: contact@achoti.co.il