Delete your Operarius account

In the app (the quickest): Settings → Account → Delete account. Confirm with your password, or by picking your Google account again. The account is gone at once.

Without the app

Write to gamedev@ittt-production.uk from the email address of your account, with the subject Delete my account. I'll confirm and delete it within 30 days, usually much sooner. If you signed in with Google, write from that Google account's address.

What gets deleted

Your account: its email address, name, profile picture's address, account ID and sign-in records.
Any support messages you've sent, unless a matter is still open.

What isn't

Your plans are on your phone, not in your account, so deleting the account doesn't touch them. To delete them too: Settings → Data & backup → Delete all data, or uninstall the app.