This application provides a simple and convenient exercise to help keep your brain fit.
All you need to do is to listen to a spoken math question, and solve them in your head. They are all just a mix of simple additions, subtractions, multiplications, and divisions, but the key is to do the calculation all in your head as you listen. It'll help you improve your listening ability, calculation ability, and at the same time help you maintain a sharp and healthy brain.
Think of it as a game, and try to continue everyday for even a short period!