It is a simple app to measure your basic attention by universal method.
It is a simple app to measure your basic attention by looking for a number that has been placed at random from 0.By repetition training, you can expect an increase in the score! for the following people-want to improve powers of observation.-want to improve ability to concentrate.-want to be a professional gamer.-look for the examination preparation.including following games-4x4 16cells.(casual!)-5x5 25cells.-6x6 36cells.-7x7 49cells.(standard!)