Katsuyo — Delete your account

Last updated 14 October 2026

Katsuyo accounts are optional: the app works fully without one, and an account exists only so your progress survives a lost device and follows you to another. You can delete yours at any time, and you do not need anyone's help to do it.

Delete it from inside the app

Open Settings → Account → Delete account, then confirm with your password. Deletion happens immediately.

If you can't reach the app

Email feedback@keshiki.app from the address the account uses, with the subject Delete my account. Using the account's own address is what lets us confirm the request is yours — we cannot action a request that arrives from a different address. Requests are handled within 30 days, and normally much sooner.

If you only joined the announcements as a guest

You can join the announcements list from the Home card without an account, by typing an email address. While you are still that guest, Remove on that card deletes it immediately. If you cannot reach the app, or the address was given under a guest identity that is not your account's (before signing in to an existing account, or as a new guest after signing out), email feedback@keshiki.app from that same address with the subject Remove my announcement signup; as above, we can only action a request that arrives from the address itself. Requests are handled within 30 days, and normally much sooner. Once announcements are being sent, each one will also carry an unsubscribe link.

What deletion removes

• Your account and its email address
• Your synced learning history — which words and forms you have practiced, every question you got wrong, and how they were scheduled for review
• Your synced high score, games played and accuracy totals
• Your synced display name, study level and audio setting
• Any leaderboard names you had hidden
• Your choice about announcement emails, and any guest announcement signup made with the identity that became this account (the one you had on this installation before creating it)

What deletion does not remove

• A guest announcement signup under another identity. One made as a guest before you signed in to an existing account, or as a new guest after you signed out, belongs to a different guest identity than the account. (An address given before you created the account is the account's own: signing back in reaches it, and deleting the account removes it.) Deleting the account does not reach the others; email the address above to have it removed (see If you only joined the announcements as a guest), or use the unsubscribe link in an announcement.
• The progress on your device. Deleting the account does not touch the copy stored on the phone, tablet or browser you are using — the app keeps working, just without an account. To remove that copy too, use Settings → Reset progress, or delete the app.
• Leaderboard scores you have already posted. Board entries carry no account information at all, so they cannot be traced back to an account — which also means deleting one cannot find them. To have an entry removed, use the ⋮ report button on the entry, or email the address above with the name and approximate date.
• A minimal deletion marker. We keep one small record — the deleted account's internal identifier and the time it was deleted, and nothing else. It contains no email address, no name and no progress. It exists so that a device still holding a valid sign-in cannot recreate the account you just deleted. This record is kept indefinitely.

More detail

The privacy policy describes everything the app sends off your device and everything it keeps on it.