SAP Build Apps Preview APP
After logging in, you can open one of your projects from the list. As you make changes in the web tool, the device will update to show your work in real time, ideal for quick prototyping and testing.
For details on Open Source Legal Notices (OSNL) for Free and Open Source Software (FOSS) see, https://help.sap.com/docs/build-apps/service-guide/mobile-app-preview