Open Settings inside the app and tap "Restore Purchases" while signed in with the same Apple ID.
Do I need an account?
No. The app works without any registration. All records are stored only on your device.
My starting level feels too easy or too hard.
Take the 1-minute Level Check from the home screen banner, or re-measure anytime in Settings. You can also raise or lower your level from the Math Road map.
The national ranking doesn't show.
Rankings use Apple's Game Center. Sign in to Game Center in iOS Settings, then reopen the app. Everything except rankings works without signing in.
Is my child's data safe?
Yes. The app collects no personal information, shows no ads, and uses no tracking. See the Privacy Policy.
Can my family share one purchase?
Yes. Mental Math Kingdom Pro supports Family Sharing.