Take advantage of a unified workflow
AR Foundation includes core features from ARKit, ARCore, Magic Leap, and HoloLens, as well as unique Unity features to build robust apps that are ready to ship to internal stakeholders or on any app store. This framework enables you to take advantage of all of these features in a unified workflow.

AR Foundation 2.1 (verified in Unity 2019 LTS)
Future-proof your AR apps
AR Foundation lets you take currently unavailable features with you when you switch between AR platforms. If a feature is enabled on one platform but not another, we put hooks in so that it’s ready to go later. When the feature is enabled on the new platform, you can easily integrate it by updating your packages rather than having to completely rebuild your app from scratch.