For your app to be successful, you need to provide your end-users with a pleasurable experience with a user interface that is engaging. A memorable and efficient user experience takes the use journey into consideration when designing a mobile application. It is vital in creating experiences that are engaging.
To achieve your business goals with your application, it's integral to manage brand reputation across multiple platforms. As a result, a well designed user interface yields scaleable traffic, revenue and contributes to customer satisfaction and retention through active daily engagement.
Don't hand your work over to a supplier hoping that they will produce the magic. They won't.