Grandmathster US app for iPhone and iPad

Grandmathster will help you improve your ability to do calculations quickly. Grandmathster gives players the choice of answering questions on addition, subtraction, multiplication, division, or mixed operations modes. Within this simple interface, the app allows different levels of customization to each game mode. You can select how many problems to solve or focus on specific digits only (e.g. exclusively working on multiples of 7). Additionally, players are able to keep track of their top scores and unlock different badges throughout the game.

Grandmathster is great for young children looking to practice their arithmetic facts or for adults looking to increase their speed. High school students can use Grandmathster to help prepare them for the portions of the SAT and PSAT that do not allow a calculator.

Created by William Munkacsy and Bilal Abbas.