Integenius is a simple, free way to practice addition, subtraction, multiplication and division. There are no lives to run out of, no crystals to buy, and no accounts to create. Why is it neon? The developer likes neon.
Integenius is a simple, free way to practice addition, subtraction, multiplication and division. There are no lives to run out of, no crystals to buy, and no accounts to create. Why is it neon? The developer likes neon.