Support
If something is wrong, tell us.
Email support@systemdesignduel.com with what happened and your iPhone model. A person reads every message.
Pro is not showing after I paid
On the You tab, under your subscription, tap Restore purchases. Pro belongs to the Apple account that bought it, so check that this phone is signed in to the same one.
Cancelling a subscription
Subscriptions are held by Apple. Tap Manage subscription on the You tab, or open iOS Settings, tap your name, then Subscriptions.
Signing in, and moving to a new phone
Daily practice needs no sign-in. Duels and the leaderboard do: sign in with Apple from the You tab. On a new phone, sign in with the same Apple Account and your progress comes back. An account that was never signed in lives only on the phone it was made on.
Notifications are not arriving
Open iOS Settings, then Notifications, then Design Duel, and check they are allowed. Daily reminders are switched on and off on the You tab.
A question is wrong
Use the thumbs down under the question's explanation, or report it after a duel, and say what is wrong. A person reviews every report, and a question reported by enough players is pulled from play until it has been checked.
Deleting your account
On the You tab, open your account and choose Delete account. Everything we hold is erased straight away. This does not cancel a subscription: do that with Apple first. If you cannot get into the app, email us and we will delete it for you.