The Heisenware App Builder is a low-code development platform that enables SMEs from manufacturing and craft industries to develop and deploy customized web applications and mobile apps with a focus on IoT at top speed. First, App Builder allows easy integration of machine controllers, sensors, software systems and other data sources and sinks. Using drag-and-drop mechanisms, front-end, complex business logic and back-end components can be created and linked. The platform also covers versioning, maintenance and hosting of IoT applications. Thanks to its innovative features, App Builder can save up to 90% of the development time compared to classic programming. In addition, the low-code approach improves communication between IT and business departments by ensuring collaboration at eye level. Transparency in the development process is improved, which drastically reduces dependence on development service providers. You also reduce costs for software maintenance and servicing. Typical use cases are mobile IoT apps, process control, remote diagnostics and smart factory.