The `master` branch is compatible with Unity 2019.2 and later. For 2018.4, see the [1.5-preview branch](https://github.com/Unity-Technologies/arfoundation-samples/tree/1.5-preview).
## Why is ARKit Face Tracking a separate package?
For privacy reasons, use of ARKit's face tracking feature requires additional validation in order to publish your app on the App Store. If your application binary contains certain face tracking related symbols, your app may fail validation. For this reason, we provide this feature as a separate package which must be explicitly included.
## ARKit 3 Support
The ARKit XR Plugin and ARKit Face Tacking packages support both ARKit 2 and ARKit 3 simultaneously. We supply separate libraries and select the appropriate one based on the version of Xcode selected in your Build Settings. This should eliminate the confusion over which package version is compatible with which Xcode version.
Tim Mowrer