UX; User Experience is often wrongly Interchanged with UI (User Interface), even by industries that offer employment to the latter. This misconception is one of the reasons mobile apps get low ratings in the app store. Most of these apps, though they promise many great features, have been victims of poor implementation.
While using my android phone in the past, I have been skeptical about using some features initially there to make me more comfortable. One of these features was the Auto Rotation feature. While this feature is on, my smartphone usage is the bomb because by rotating the screen, I can easily view a picture from a different dimension, watch YouTube videos in full screen, and maximize the UI of various mobile applications.