With the Metaio SDK you are able to

With the Metaio SDK you are able to create one platform independent Augmented Reality experience with AREL instead of using platform specific programming languages - Java for the Android SDK, Objective C for iOS and C++ for Windows. You can then deploy it to your target platform/s based on the Metaio SDK and are able to extend your platform portfolio easily with little extra effort.

Of course you are still given the ability to add extra – platform specific – functionality and to access the Metaio SDK via the platform specific interface independently.