Braille : For visually-impaired people

I have developed this application after spending much time with my aging grandparents who had problems with their vision. With already 8,960 views and downloads, this app helps in improving the mathematical abilities of the visually impaired by providing tests on multiplication, addition, division and subtraction. Once you open the app on your phone, the phone speaks out exactly what needs to be done step by step and therefore, needs no reading or typing on the part of the user.