Award-based and Time-based arithmetic and math drills. Choose from all of your favorite set operations; addition (+), subtraction (-), multiplication (×), and division (÷). Answer the problem correctly to advance and win prizes on the built-in operation tables. Tellcraft - Universal math app for iPad, iPhone, and iPod Touch. Specially designed for iOS 6 and built with iPhone 5 in mind, Tellcraft brings graduated-interval recall to the next level for mathematical operations. If you can tap you can master arithmetic with Tellcraft. Tellcraft is free and fully functional for addition and subtraction.