Want to improve your maths skills? Mental maths ain't your greatest strength? Drag the card up to select and confirm - release to find out if you were right! Sum It is designed to help people of all skill levels and ages improve their arithmetic skills, through fast-paced, challenging, and fun modes. Challenge your friends and family for the highest score! Easy-to-learn controls, and addictive gameplay mechanics. No In-App Purchases, or adds - pay once to play.