Support

Help with Second Nature: Math Facts for iPhone.

Restore a purchase

On a new or reset iPhone, open Settings in the app (the button at the top of Home) and tap Restore Purchases. The unlock comes back for the Apple Account that bought it. Restore Purchases is also on the unlock sheet.

Redeem a code

If someone sent you a code, open Settings in the app and tap Redeem a code, or open the redemption link on your iPhone. You can also redeem it in the App Store under your account. Each code works once.

Family Sharing

One purchase covers everyone in your Family Sharing group, so a second parent's iPhone unlocks without paying again. Progress stays on each phone and does not sync.

Choose what to practice

The switch above Start picks addition and subtraction, all four operations, or multiplication and division. It keeps your choice until you change it. The app still picks every card.

Reset progress

Settings, then Reset progress, clears the grids, answer times and days in a row. The purchase is kept.

Why didn't a square fill?

A half fills only when the answer comes in under 3 seconds, at least one full round after the answer was last shown. A fact your child missed in this round can fill in a later one. New fills appear on the summary at the end of a round, not during it.

Requirements

An iPhone on iOS 26 or later. Rounds work without an internet connection. Buying the unlock or restoring it needs one.