Apple unveiled on Monday a new technology that will help mobile games run more smoothly on the company’s phones and tablets by lowering the graphical processing power they require. The Metal API allows games to perform better than they do with OpenGL, according to Craig Federighi, Apple’s senior vice-president of software engineering, who spoke on stage at the Worldwide Developers Conference. Metal will launch along with iOS 8 later this year, and is designed to work with the A7 chips found in the latests iPhones and iPads.