Privacy Policy

App: ChuuiCroc · Last updated: 2 March 2026

  Short version: ChuuiCroc does not collect, store, or share any personal data on any server.
  Everything stays on your device. The only external communication is the requests your device makes directly
  to WaniKani on your behalf.

1. What ChuuiCroc does

ChuuiCroc is a notification app for WaniKani (a third-party Japanese learning service). It periodically checks the WaniKani API using your personal API key and displays a local notification when reviews or lessons are available.

2. Data stored on your device

The app stores the following data locally on your device only:

WaniKani API key — stored in the Android Keystore (Android) or iOS Keychain (iOS), the platform's secure credential storage. It is never transmitted anywhere other than the WaniKani API in the request headers that you initiate.
App settings — notification preferences, check interval, quiet-hours schedule, and theme. Stored in standard app preferences (SharedPreferences / NSUserDefaults). Not sensitive.
Cached review/lesson state — the set of WaniKani subject IDs from the last check, used to avoid repeat notifications for the same queue. Stored locally and never transmitted.

3. Network requests

The app makes HTTPS requests to the WaniKani API (api.wanikani.com) on your behalf. These requests include your API key in the authorisation header, exactly as if you were calling the API yourself. No other servers are contacted by this app.

WaniKani's own privacy policy governs how they handle your data: wanikani.com/privacy.

4. Data we do not collect

No analytics or usage tracking
No crash reporting services
No advertising identifiers
No device identifiers
No location data
No contacts, camera, microphone, or any other sensitive permission

There is no backend server associated with ChuuiCroc. No data ever leaves your device except the API requests described in Section 3.

5. Android permissions explained

INTERNET — required to contact the WaniKani API.
POST_NOTIFICATIONS — required on Android 13+ to display notifications.
VIBRATE — used when a notification is shown.
RECEIVE_BOOT_COMPLETED — allows the background check to resume automatically after a device restart.
REQUEST_IGNORE_BATTERY_OPTIMIZATIONS — lets the app ask you to disable battery optimisation, which improves the reliability of hourly background checks. Granting this is optional.

6. Children's privacy

ChuuiCroc is not directed at children under 13 and does not knowingly collect any information from them.

7. Changes to this policy

If the privacy practices of the app change materially, this page will be updated with a new date at the top. Continuing to use the app after a change constitutes acceptance of the updated policy.

8. Contact

Questions about this privacy policy can be sent to chuuicroc@rdacted.com.