One or the other may still remember Blackberry, Windows Mobile or even Symbian on Sony Ericson smartphones. In the meantime, however, Google’s Android (approx. 78% market share in Germany) and Apple’s iOS (22%) have asserted themselves as top dogs – other operating systems for mobile devices can be neglected as a target group nowadays. Even though the two platforms have become more and more aligned in recent years, both companies continue to rely on their own developer SDK (Software Development Kit) to develop native apps. Native apps are installed directly on an end device and tailored as good as possible to the underlying operating system. Modern Android apps are primarily written in Kotlin (formerly Java), while the iOS SDK is based on Apple’s own Swift language (formerly ObjectiveC). A native Android app cannot run on an iOS device and vice versa. Accordingly, the development of a separate application for the respective platform is necessary. Hybrid app development or web app development can provide a remedy.