“GameSir World” is a free app available in Apple Store and Google Play. “GameSir World “is developed by GameSir with thousands of Smartphone games supported by GameSir gamepad. Every Android gamer and iOS gamer can grab their favorite mobile game easily now. The perfect combination of GameSir hardware and GameSir software brings the ultimate gaming experience to every GameSir’s user. “GameSir world” put emphasis on popular smartphone games for gamers’ wide choice.