The old Hay fever app was technically outdated for both iOS and Android. With the construction of the new native iOS and Android app, we replaced the two excisting codebases for one shared Xamarin code.
This provides a range of advantages for the control of the app. Changes in the functionality of the app do not have to be written in both versions due to the shared codebase. Now we can preform adjustments in the codebase. Based on these adjustments the app is constructed for both iOS and Android and presented in the app-stores. This development approach made it possible to implement changes and new functionalities in an efficient way.
Also, the user interface is shared on the base of Xamarin. Due to this shared codebase we were able to equalize the functionalities for iOS and Android. It is possible to add specific implementations and optimalizations for only Android or iOS. There is still a lot of flexibility!