"MM Go" means "Mental Math on the go." This game is designed to encourage EVERYONE of all ages to practice calculation skills while having fun in unlocking levels or battling with others. Nowadays, people are getting more and more dependent on electronic devices to do math, and give less and less opportunity for the brains to do the work. This app wants to remind people: you will never know how powerful your brain is! Selected schools are the first level venues for people to practice, meet, and battle. Those who collect enough rewards are qualified to battle at the state, national, and eventually the world levels. The final world champion of each operation (+/-, multiplication, and division) of each age group will each win US$1000 from the MM Go company. Every correct answer will be recorded as points of millage for each player. Players can use accumulated millage to travel to a place that is outside of the default radius range and play. This gives players the opportunities to meet other players in distance, setup high records, and collect more rewards. ​MM Go is the very first attempt of math gaming app for players to virtually interact in various scales. Updates and improvement are the continuous efforts of the apps. Your comments and feedback are very much welcome. To contact us, please visit the website at https://www.iQabacus.com/MMGo.