Stock Android means the default ROM image on your phone. In plain words, it is the default operating system version that came from the manufacturer. Some manufacturers like Samsung run their own version of user interface (UI) on their devices (like Samsung’s Touchwiz, HTC’s Sense, etc. While stock and pure android are basically the same ..there is a difference though! they keep the os almost pure but add a couple of tweaks here and there like in the camera app and in some proprietary apps like moto actions . … Stock Android and pure Android are almost the same. But only the terminology is different.