I will be evaluating mobile phones interface. The good is the precision on the placement of the apps when it has a simple layout that is not cluttered and easy to navigate that can be aesthetically pleasing. The familiarity of the buttons that it points to a specific action required by the user. Colors give an impression enough to build trust because it leaves an impression to an audience at first glance. Lastly, consistent design language which is a design language in the interface that helps create a sense of unity. The poor design aspects are overcrowded application that it is confusing would make the users less engaged. The annoyance of a pop up covering up your screen and the type of font used can alter a user's engagement. A small screen that accommodates a lot less content. Typing on a touchscreen can be impossible in the absence of haptic feedback and the small keys are crowded. The challenges of mobile interfaces with google glass is that the battery life didn't last long and the tapping, swiping, head gestures, and voice recognition was not always smooth. The challenges with S voice are that it doesn't understand the users voice and punctuation are wrong. Lastly with Siri misinterpret commands, fails to give accurate responses, and its understanding of regional accents.