They’re convinced that this helps differentiate their products in the market, although diehard stock Android enthusiasts disagree.
When a new version of Android is released, OEMS have to port their custom software and tweaks to the latest version.
These include Samsung’s Touch Wiz, HTC’s Sense, Motorola’s Motoblur, and others.
In addition to adding custom launchers, OEMs tweak included apps to add and remove features.
In some cases, the custom software is incompatible.