Delete your account
In the app, open Settings → Delete account. Review what will be removed, then confirm with your password or the same Apple/Google account. Deletion removes the account, profile, server records and push registrations. Apple authorization is revoked for Apple accounts. Old account sessions stop working.
Your local journal is separate and remains available without login. To remove it too, use Settings → Clear all data. Exports already shared with other people or apps are not removed by deleting the account. If you cannot access the app, submit a privacy request through Support; ownership verification is required before account data can be removed.