Menrong Jiang

MRJC — a husband-and-wife team

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About

MRJC is a husband-and-wife team from Taiwan — our initials, not a company. Math Game is published on the App Store under Menrong's developer account, and we build it and answer here together. 60-second mental-math rounds that make practice actually stick. Free, no ads, no account, no in-app purchases.

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Maker History

Math GameGet good at mental math in 60-second rounds
Sep 2026

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Joined Product HuntSeptember 5th, 2026

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Math Game - Get good at mental math in 60-second rounds

Spark the motivation to learn, enjoy it, and get good at math without even noticing. Math Game is a 60-second arithmetic game. Tap an operation and the round starts: 3 lives, questions that get harder as you go, and every miss reviewed with the correct answer. 15 buddies, sticker albums, a daily goal and a streak ladder keep you coming back. Weekly and all-time world leaderboards. No login, no ads, no in-app purchases. Built on retrieval practice and spaced repetition.