Say hello to Purr, the all-in-one resolution changer for Android devices, no root required! How does it work you ask? We use Android SDK reflection to access hidden APIs to change the resolution of your phone screen. All we need is a special permission that can be granted using ADB. Why would you want to change the resolution of your display, anyway? - Reducing the resolution of the display reduces the load on the GPU. - Some games may fit a standard 16:9 display better than widescreen displays