Embodiments illustrated and described herein provide systems, methods, and software of an app system platform that enables apps to provide rich user experiences in accessing and utilizing functionality of an enterprise-class computing system, such as an ERP system. Some such embodiments include groups of mapper objects in a web framework for each supported app that handle specific data types communicated between the app and a web platform. The mapper objects transform data between app consumable formats and formats of connector objects. The connector objects operate to transform data between the respective connector object formats and data formats of consumable by an enterprise-class computing system via interfaces. These and other embodiments are illustrated and described herein.