MotionVFX is a specialized boutique developer. They are not a massive corporation like Adobe. They provide extensive support, tutorials, and continuous updates for their tools.
9/10. It is arguably the best motion tracking solution available for the macOS video editing workflow.
While primarily a computer vision library, OpenCV has tools and functions that can be used for 3D motion tracking.
While there isn't a permanent free version, MotionVFX occasionally offers discounts (ranging from 30% to 50%) during sales events like Black Friday. Why mTracker 3D is Highly Valued