Internet of Things (IoT) devices and the software they execute are often strongly coupled with vendors preinstalling their software at the factory. Future IoT applications are expected to be distributed via app stores. A strong coupling between hard- and software hinders the rise of such app stores. Existing model-driven approaches for developing IoT applications focus largely on the behavior specification and message exchange but generate code that targets a specific set of devices. By raising the level of abstraction, models can be utilized to decouple hard- and software and adapt to various infrastructures. We present a concept for a model-driven app store that decouples hardware and software development of product lines of IoT applications.