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 agoFirst 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.