Privacy Policy for "Crazy Kanji Master" (先取り 漢字マスター)
"Crazy Kanji Master" (the "App") is a kanji learning app designed for children to use safely. We, the developer, respect your privacy and set out the following policy.
1. Information We Collect
The App does not collect personal information such as names, email addresses or location. No account registration is required. We receive information from you only when you choose to send us an inquiry (feedback) email (see "7. Contact and Feedback").
2. Where Data Is Stored
All data, including study history, progress, settings and purchase records, is stored only on your device. It is never sent to our servers.
3. Advertising and Analytics
The App does not show ads. The App does not use any analytics tools.
4. In-App Purchases
The App offers purchases that remove the daily study time limit for each grade. Payments are processed by the App Store or Google Play, and the App does not obtain your payment information. Purchase records are stored only on your device.
5. Notifications
The App uses your device's notification feature only if you set up study reminders. Notifications are scheduled on your device and no information is sent outside the device.
6. Children's Use
The App is intended for use by children. We do not collect personal information from children. Before any action that leaves the App, such as opening the store page or sending an email, and before purchasing or restoring purchases, the App shows a check for parents (a math question).
7. Contact and Feedback
If you send an email from "Feedback" in the App, we receive your email address and the email body (what you wrote, plus the app version, your device's OS version and model, the display language, the purchased grades and a record of errors that occurred in the App, if any). We use this information only to reply to you and to improve the App, and we do not share it with third parties. You can review and delete any part of the email body before sending.
8. Deleting Data
You can erase study data from "Reset all study history" in the App. Uninstalling the App from your device deletes all stored data. If you would like us to delete an inquiry email, please contact us at the address below.
9. Changes to This Policy
If we change this policy, we will announce it in the App and on the public page together with an app update.
10. Contact
Established: July 8, 2026
Last updated: October 23, 2026