The Oculus Mobile SDK includes libraries, tools, and resources for native C/C++ development for Oculus Quest, Oculus Go and Samsung Gear VR. If you work primarily with Unity or Unreal Engine, in most cases it is not necessary to download the Mobile SDK.
For more information, see our Mobile SDK Developer Guide.
For details on migrating to Mobile SDK 1.25 from previous versions, see the Mobile SDK Migration Guide.