Use them just like paper flashcards, but you don't have to worry about losing them!
It's very easy to use!
Swipe left or right to go through the deck.
Swipe up or down to flip over the card. The front side has the color with the spelling. The back side has the color only.
Double-tap the screen for a random color.
Check out ColorsLite for free which is a basic version without the spellings to see if this is right for you.
Also, iColors is available for other languages - English, Italian, Spanish, and Greek.
Please email suggestions or bug reports to firstname.lastname@example.org.