If you want users to like and continue using your smartphone app, you need to make sure to provide a fluid user experience. Here’s an example of what not to do.
iPhone App Usability Review
The importance of a well-designed user interface and keeping functions consistent throughout a smartphone app can’t be emphasized enough. When users encounter inconsistencies, it creates confusing and frustration. Even to the point where they will stop using your iPhone application.
In the above demonstration video, I use the LinkedIn iPhone app as an example of how their sharing options — specifically the icons — could be improved to provide a better user experience.