Color blind test numbers for Android
Is what it says
It force you to choose a number even if you did not see one then only told you whether your answer was right or wrong, not what that meant (not that it would have meant anything anyway since by pure randomness of picking the number on the right side when I could not see a number I got 1/3 of them right).
Didn't work
by K####:
If you can't see a number you have to pick one. There should be an option to say nothing