The talk presents the main features of the latest version of the ARMedia SDK with a focus on the 3D object tracking capabilities from a developer's perspective. The whole process involved in the creation of 3D trackable data will be discussed using both CAD-based and photogrammetry-based approaches, showing the strengths and weaknesses of each with reference to real-world use-cases. Finally, the brand new multiple-objects tracking feature will be demonstrated with reference to a car-tracking scenario.