Sempoa - Abacus Math for Kids

Sempoa brings the real soroban abacus to your phone — a hands-on way for kids to learn how numbers actually work, not just memorize answers. Every lesson is built around the same bead moves a child would learn on a physical abacus, taught step by step until it clicks. Start with 5 lessons free, no sign-up needed. Unlock the full 28-lesson course — from the very first bead move to fast mental math without touching the abacus at all — with a single one-time purchase, no subscription. WHY SEMPOA • 28 guided lessons — from forming numbers one rod at a time to multiplication, division, decimals, and mental calculation, each with a worked example before the exercises. • Interactive example boards — kids move the beads themselves on every lesson's practice abacus, with instant right/wrong feedback instead of just reading theory. • Practice mode — generate math questions on a real abacus board, with a timer, live score, and accuracy tracking session after session. • Custom question sets — choose digit range and question count, or build your own set, to match exactly where your child is. • Completion certificate — finishing every lesson earns a certificate with your child's name, ready to save or share. • Multiple child profiles — one app, one purchase, every kid in the family gets their own progress and settings. • Parent gate before purchase — a simple age check stands between a curious tap and an actual purchase. • Landscape-only design — the wider screen mirrors how a real abacus is held, with the whole frame visible at once. WHO IT'S FOR Parents looking for a real alternative to rote math drills, and kids ready to see numbers instead of just answering them — whether they're just starting out or already attending an abacus/mental-math class and want more practice at home. A NOTE ON SUPPORT Sempoa has no ads anywhere in the lessons or the abacus itself. The only ad is optional: tapping Hint during a practice question shows a short ad first, and needs an internet connection — skip it and everything still works offline. Sempoa doesn't require an account: your child's profiles, progress, and settings stay on the device, and the app doesn't ask for more permissions than it needs. A real teaching method, not a guessing game — built so kids understand the beads, not just tap through them.