Gray Zone app for iPhone and iPad

4.4 ( 6654 ratings )

Games Education Educational Trivia
Developer: Noriyuki Morimoto

Free

Current version: 1.0, last update: 7 years ago
First release : 03 Sep 2012
App size: 1.87 Mb

It is a game I tap a color made questions for from black gradation by white, and to tap.
I may train sense of color.