Email support@koini.io — include your app version (Settings → bottom of screen) and the chain involved. We answer within two business days.
Common answers: the app never needs your seed phrase or private key for anything — if a screen anywhere asks for one, it is not ours. Balances come straight from the public chain; if something looks wrong, pull to refresh first. "Estimated" numbers are the market range on the day tokens arrived, not your fill — tap any estimate to replace it with your real number.
To remove everything the app knows: Settings → Delete all data. There is no cloud copy.