Sum SproutMath that moves

One small answer. One big step.

A gentle addition and subtraction game for iPhone and iPad. Every right answer lays a plank, bringing a little rabbit closer to the other side.

Six facts per bridgeTwo bridges freeNo countdown

See how it works Read the privacy policy

Real Sum Sprout iPhone gameplay screen: the rabbit stands on the fourth of six planks above an addition question and large number keys — Real iPhone gameplay, captured from the app.

Practice children can see.

Each bridge is a short round of six addition or subtraction questions. Progress is visible in the scene, not hidden behind a score.

01 · SOLVE

Try one fact

Large number keys keep the task focused. A wrong answer offers a gentle retry with visual dot hints.

02 · PLACE

Grow a bridge

A correct answer adds one plank, and the rabbit moves with the bridge toward the other bank.

03 · CROSS

Finish together

Complete six facts to reach the other side. There is no timer, leaderboard, or pressure to race.

Real Sum Sprout Grown-ups screen showing practice counts, accuracy, facts to revisit and mastered facts — Real app screen; the figures shown are sample practice data.

For grown-ups

Know what to practice next.

Progress on this device. See facts practiced, first-try accuracy, bridges built, facts needing another look, and mastered facts.

A clear choice. Start with two free bridges. Continued play is available through one optional, non-consumable App Store purchase; the app shows the local price before purchase.

Family privacy. No account, ads, or third-party tracking. Practice records stay on this device and can be erased in Grown-ups.

Sum Sprout uses Apple StoreKit for the optional purchase. The game does not send a child's practice records to Ylemos. See the product-specific privacy policy.