Metaio SDK currently offers two kind of marker less image tracking - a Fast and a Robust method. The Fast method works well on a wide variety of target. It runs quite fluently on most relatively recent smart phones and it is very stable on moderately textured targets. The Robust method should be tried on targets where the Fast method did not provide satisfactory results. The Robust method fits well to highly textured targets. The tracking results obtained with the Robust method improves over time: the more and the longer you move the mobile device in front of the tracked target the better the tracking gets. In Markerless Configuration, markerless image tracking is explained in more detail.