Memory Flex is an interesting game that tests your memory and power to retain visuals mentally. You are presented with a set of even cards, each hiding an image underneath. You may turn a card by tapping to see the image, and then proceed to tap another card. If the image on that card is same as on the card you opened previously, you would have matched two cards and both will remain open. Else both cards will close and you may carry on finding matching images by tapping cards.