The system of IOS is made perfectly, and the game was originally made on IOS, and later transplanted to Android. As for which is smoother, I personally experienced it. With its retina screen, IOS looks very comfortable, so it gives people a smooth feeling. Android phones have different experience effects according to the hardware configuration of each mobile phone. Generally speaking, the higher the Android configuration, the better the effect. Generally speaking, it is better than the MAC of IOS ~ Y.