LetAbacus - Soroban for Kids
Mental math, no ads, offline
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Soroban for kids: flickable beads, lessons for all four operations, a mental math ladder, visual and listening drills, daily quests and badges. No ads, no tracking.
A soroban (Japanese abacus) app that parents can safely hand to young kids.
There is almost no text on screen — kids learn through animated demos, glowing
beads and cheerful voice encouragement. Mistakes never get a big red X, just a
friendly "try again!".
‧ A real-feel virtual abacus: multi-touch beads with a satisfying wooden click.
‧ Lesson mode: 19 units, 50 lessons — from meeting the abacus and simple add &
subtract, through friends-of-5, friends-of-10, mixed complements, a
place-value dojo, running sums, first multiplication and division and a
four-ops cup, on to formal soroban multiplication and division with proper
rod positioning — remainders, two-digit divisors and decimals included.
Every lesson in three steps — watch, follow the glowing beads, then try it
yourself for three stars.
‧ Understand first, then flick: before each complement unit, kids play a
picture puzzle — "how many more to make 5 (or 10)?" — and after the lesson
they solve it again with brand-new numbers, proving they truly got the idea.
‧ Mental math ladder: on the board, then flash, then air flick (invisible
beads, real flicks), then pure mental math — moving the abacus into your
child's head one step at a time.
‧ Sense Island: count at a glance, how-many-more to 5 and 10, which side has
more, and peek-and-rebuild bead memory — number sense before numerals.
‧ Visual drills and Arena mode: difficulty follows your child's lesson
progress, or pick your own level, earn points, and re-practice tricky ones.
‧ Listening drills at your child's pace: the app calls one term ("five"), waits
until the beads really show 5, then calls the next ("plus three"). Three
paces (slow / medium / fast), with one replay if missed.
‧ Big Review boss: mixed practice of everything learned, with a help-me button.
‧ Three little daily quests with a streak flame, plus a badge wall of silver
and gold badges.
‧ Bead skins to collect: wooden, candy, starry night, dino, neon and more —
10 skins, all unlocked by practicing — never bought with money.
‧ Voice encouragement in both English and Traditional Chinese.
‧ A parent zone behind a parental gate: insight cards, a "5 minutes today"
suggestion, a learning snapshot export, language and pace settings.
Our promise: completely free, no ads, no tracking, no data collection. All
learning content and progress work fully offline. An optional tip jar (buy the
developer a coffee) lives behind the parental gate, is handled by Apple,
is unreachable by children, and unlocks nothing.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
LetAbacus 1.1: all four operations, plus mental math!
- Lessons grow from 18 to 50: new multiplication and division units — times as
repeated adding, divide as sharing out, right on the beads
- Formal soroban multiplication and division: rod positioning, step-by-step
guided lessons, remainders, two-digit divisors and decimals
- Understand first, then flick: picture puzzles before each complement unit
("how many more to make 5 or 10?"), re-checked after the lesson with new
numbers
- Place-value dojo: build 3-to-5-digit numbers, read the beads, hear and build
- Mental math ladder: on the board, flash, air flick (invisible beads), pure
mental math — with rising points
- Four-ops cup and Big Review: mixed puzzles where kids pick the right move,
with a help-me button
- Arena mode: pick a difficulty, earn points, re-practice what's tricky
- Question board: the problem lines up digit-by-digit with the beads, so a
wrong rod shows at a glance
- Three little daily quests with a streak flame, plus a badge wall
- A new "what's next today" card on the home screen — one tap starts the best
next step
- The course map now shows lesson names, focused on the current and next unit
- Parents: new insight cards, a learning snapshot export, and a rate-us link
- New neon bead skin
The developer, RUEI YI WU, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- RUEI YI WU
- Size
- 6.5 MB
- Category
- Education
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
- iPhone
- Languages
- English and Traditional Chinese
- Age Rating
4+
- 4+
- Made for Ages 6–8
- In-App Purchases
Yes
- Large Coffee $9.99
- Medium Coffee $4.99
- Tip Jar - Small $0.99
- Copyright
- © 2026 RexCode