Every right answer makes the screen and the music a little more festive. Mistakes never cost points — instead, your child sees what went wrong, with a picture.
Right answers earn sparkles, and the confetti, lights and music build up question by question until the final one sets off a full celebration. “One more round!” comes naturally.
A new unit starts with a picture and a worked example. While it is still new, problems are solved step by step, the way the textbook does it. Once it sticks, your child just writes the answer.
Every single fact — 7×8, 13−6 and so on — is scheduled by FSRS, an algorithm based on memory research, so it comes back just as it is about to be forgotten.
Try a times-table question. Get one wrong on purpose and see how the app tells you what kind of mistake it was.
Your child writes the carried 1 too. Long division goes divide → multiply → subtract → bring down.
Following the order of Japan’s national curriculum: addition and subtraction, carrying, times tables, division with remainders, decimals, fractions and mixed numbers, ratios — plus clocks, units, rounding, factors and multiples, and solving for x.
Written arithmetic on a grid, one digit per square, with the little carry and borrow digits written by your child. Long division step by step, and decimals too.
Forgot to carry, mixed up a neighboring times-table fact, remainder too big, decimal point in the wrong place… The app works out the cause from the answer and shows a short tip and a picture — ten frames, dot arrays, blocks, fraction bars. Missed problems go to the mistake notebook.
An 81-square map that lights up as facts are learned, and a time attack for each table to beat your own best.
Daily missions, stickers and a streak calendar. Playing earns trophies that unlock backgrounds, music, outfits and more.
Apple Intelligence turns a calculation from the round into a short word problem. The numbers and the answer are always worked out by the app — the AI only writes the words. Requires a device that supports Apple Intelligence.
Choose a favorite. Your buddy cheers every right answer and is there to encourage after a miss.
Give them a tap ☝︎
Poposan is deliberately simple, so children can use it on their own.
Read the privacy policy →No advertising, ever shown. All features are currently free.
No name, email or age to enter. Download and start.
Learning records are stored only on the iPhone and in your own iCloud, and are never sent to us or anyone else. No analytics or tracking tools.
There is no social or chat feature. The only outside links in the app are in Settings: this site's support and privacy pages, and a credit to the project that inspired it (GitHub).
After the first round, the app asks whether to allow an early-evening (6 pm) reminder. Turn it off anytime in Settings.
AI features run on Apple’s on-device model or Apple’s Private Cloud Compute, using only the numbers from the round. We never see the results.
Yes. All features are currently free, with no ads.
Elementary school grades 1–6. Pick a grade and the units follow the order of Japan’s national curriculum. You can also practice any single unit you like.
No. Hints and pictures help your child finish every problem. Mistakes are recorded by kind, and weak spots come up a little more often.
Yes. All the math practice works offline. “Story problems” may use the network depending on the device.
If you are signed in to iCloud, just sign in with the same Apple ID on the new iPhone and the records come along. Two iPhones on the same Apple ID stay in sync automatically.
Rounds are short — perfect for a few spare minutes.
