Design of iOS app

We are in the process of developing a new app, we have the technical aspects in place but need a design for the app. About the app: The app helps Danish train commuters to remember to check out with their travel card. The app consists of 4 features with a few screens within them. The design should have an Apple (The company) like design and the color scheme should consist of Blue, grays and dark grays (See reference picture of the check out strand). Where applicable Apple's "gray background linen mesh" should be used as the background. To sum up, the job consists of designing an app Logo, designing the screens, 4 icons for the in app buttons, design of "Check out stand". To be considered, please provide prototype.