Math Mad Quick

I have found that we can be at least 20% smarter if exercising our brain daily. And the good thing is that our brains doesn't need to exercise hard. According to the researches by Dr. Ryuta Kawashima, quickly solving basic calculations do really make many parts of the two brain hemispheres active, especially in the anterior cortex forehead. It can surprisingly improve neuron connections, short-term memory and quick reaction. Working with simple math regularly also train our brain to enter the highly focused state quickly. How to practice, take out a paper and write random math expressions there. Solve them and record the time it takes to complete. After a week, evaluate the results. It is really inconvenient working with paper and pencil, so I created a simple mobile app to simplify those practice. I found myself that it is really fun and enjoyable. My daughter love it :). I sent to my colleagues and they enjoyed it :). We are now often challenge each other in the office for coffee. I am planing some features for the next version, such as Hall of Fame, Dual mode and Tournament to play with friends. I am very hungry for your feedback to improve this app. Thank you very much