Math Monsters — A Math Practice Game Where Kids Catch Monsters
Addition, subtraction, multiplication and division drills for kids, wrapped in a game where every correct answer catches one more monster.
Info
Math Monsters is a math-practice game for kids: solve addition, subtraction, multiplication and division problems to catch monsters. Addition and subtraction (easy) are free; other operations unlock via one-time in-app purchase. No ads.
Update (2026-09-05): every in-app purchase has been removed and all modes are now free. The story is in Why we went free.
Learning Math by Catching Monsters
A learning game where every problem a child solves catches one more monster. Answering quickly and accurately leaves a better record behind, which is usually reason enough for a child to go back and try again.
- 👾 Four operations — addition · subtraction · multiplication · division
- 🎚️ Three difficulty levels — easy · normal · hard
- 🏆 Saved records — a best score per operation and difficulty, so progress is easy to see
- 🆓 Every operation and difficulty is free (at launch only easy addition and subtraction were free; everything went free on 2026-09-05)
There are no ads, and there is no sign-up or login — you can start playing right away.
Gameplay Video
Download
- Google Play: https://play.google.com/store/apps/details?id=com.fadongkwon.math_monsters (opens in a new tab)
- Apps in Toss: https://fadongkwon.com/toss/math-monsters/ (opens in a new tab) — open it on your phone and it connects straight into the Toss app.
The backstory — how my eldest quitting Kumon led to Dad building his own practice tool — is in The Day We Quit Kumon, Dad Started Building a Math Game.
I post updates here and on Instagram (@fadongkwon.soft) (opens in a new tab).