Privacy Policy (App)

There is no sign-up, and your practice records stay on this device. Ads may use third-party cookies and identifiers.

What we do not collect

This app has no sign-up or login.
It does not ask for or store personal details such as your name, email address or phone number.
Answers you type and characters you draw during practice are processed on the device only and are never sent to a server.
It does not collect location data, and it does not request permissions such as camera, microphone or contacts.

Practice records (correct and wrong counts per kana) and settings (question range, number of questions, etc.) are saved in the device storage.
These values exist only on the device you use and are not synced to other devices.
They are deleted when you tap “Reset records” on the records screen or uninstall the app.

Writing practice uses the on-device recognition of Google ML Kit.
Recognition happens on the device; what you draw is neither uploaded nor stored.
The language model needed for recognition is downloaded once and kept on the device.

This app shows ads through Google AdMob.
Google and other third-party ad vendors may process information such as device identifiers, ad impression and click records and IP addresses to serve and measure ads.
On Android the advertising ID (AAID) may be used; you can turn off ad personalization or reset the advertising ID in the device settings.
On iOS the app does not request App Tracking Transparency (ATT) permission and does not collect the advertising identifier (IDFA).
Ads are shown only in places that do not overlap the question area or the writing pad.

If you use the app in a US state with a privacy law such as California, you can opt out of the sale or sharing of your personal information from “Ad privacy settings” on the privacy screen.
You can keep using the app after opting out; you will then see ads that are not based on your activity.
Your choice is stored on the device and can be changed at any time.

When the content changes, this page and the app screen are updated together with the date below.

Last updated: 2026-10-30