The Realm Swift SDK supports connecting to an Atlas App Services App for a range of Apple operating systems depending on the Xcode version and Realm Swift SDK version. Connecting to an App Services App enables:
- Authentication and User Management
- Calling an Atlas Function
- Querying a MongoDB Atlas Data Source
- Device Sync
For current information about supported operating systems, refer to :ref:`swift-os-support`.
At this time, the Realm Swift SDK does not support connecting to an App Services App from watchOS.