Ultimately, Fusion Server is the back end for your search applications.
Starting in Fusion 5.0, App Studio is no longer included in the Fusion UI. However, you can use App Studio Enterprise (ASE) to create apps in Fusion 5 and Fusion 4. See How to Deploy App Studio Enterprise for instructions.
See the App Studio Enterprise Download page for more information.
If you develop your own search application from scratch, it must make calls to Fusion’s REST API in order to retrieve search results or perform other actions, such as uploading blobs, modifying user roles, or sending messages.
Certain features require configuration on the Fusion back end before you can surface them in your application: