Color Challenge - Test Your Color Vision is a fun and addictive game available on iPhone. The objective of the game is to identify the square with a different color from the rest. It's a simple concept, but it will test your color vision and attention to detail.

The game starts off easy, with only a few squares to choose from, but as you progress, the difficulty increases with more squares and subtle color variations. How far can you go without making a mistake?

One great feature of Color Challenge is the ability to share your progress with friends. Challenge them to beat your high score and see who has the best color vision. The game also offers an Apple Watch app, allowing you to play on the go without needing to take out your iPhone.

Overall, Color Challenge - Test Your Color Vision is an engaging game that will put your color vision to the test. It's a great way to pass the time and challenge yourself. Download it for free today and see how well you can differentiate colors!