Delete your account and data
Last updated: October 28, 2026
In short: Kylin works without an account, and whether or not you ever linked one, you can erase everything from inside the app: Settings, then Delete account. If the app is no longer installed, use the email request at the bottom of this page. App: Kylin, published by IOCODO LLC, bundle id com.iocodo.kylin.
1. From the app, which is the fastest way
- Open Kylin.
- Tap Settings.
- Scroll to the bottom and tap Delete account.
- Confirm. If you had linked an Apple or Google account, that provider asks you to sign in once more so it knows the request is yours.
Deletion is immediate and cannot be undone.
2. What gets deleted
- Your account itself, including its random user ID and the link to any Apple or Google account, along with the email address and display name that linking gave us.
- The backup of your learning progress: for each word and character, when it is due again, how many times you have reviewed it and forgotten it, and any mnemonic you wrote yourself.
- Any content reports you sent with Report a mistake.
- The device and version record described in section 6 of the Privacy Policy, and any Kylin Pro record we added to your account ourselves.
- Your phone's registration for News from Kylin, if you had turned it on.
- All learning progress held on the device you are using.
Any copy left in our backend systems is removed within 30 days. Afterwards the app keeps working normally, from zero, as a fresh install.
3. What does not get deleted
- Your Kylin Pro purchase. It belongs to your App Store or Google Play account, not to the account in the app. It stays valid and comes back with Restore purchase. Deleting your account is not a refund request: for that, contact the store you bought from.
- Usage statistics already sent to Google Analytics for Firebase. They carry no name or email address and are tied to a random identifier of the installation, not to your account, and Google deletes them at the end of the retention period of our Analytics account.
- Crash reports, kept for up to 90 days to monitor stability and then deleted.
- Device backups made by Apple or Google, which you control in your system settings.
4. If you no longer have the app installed
Write to support@iocodo.com with the subject "Kylin Account Deletion", sending the message from the email address you used to link your Apple or Google account. We need that to find the right data and avoid deleting someone else's account.
We complete the request within 30 days and confirm by email when it is done.
If you only ever used Kylin as a guest, there is no email address attached to your account and we have no way to find it. Reinstall the app on the same device and use Settings, then Delete account. Uninstalling removes the data on your phone, but not the backup on our servers, which then stays unused.
5. Deleting less than everything
To erase only your study progress and keep your account linked, open Settings and tap Reset progress. To keep your data and only disconnect, use Sign out, which deletes nothing.
6. Contact
IOCODO LLC
Email: support@iocodo.com
Privacy Policy: iocodo.com/apps/kylin/privacy