We describe a lightweight augmented reality approach enabling arbitrarily complex virtual models to be operated even on low end camera phones. For optimal performance we apply simple motion tracking with manual initialization, and sequences of 2D images to give illusion of three dimensions. Our approach enables also augmenting of real objects, not just virtual ones. A prototype implementation of the solution exists for Series 60/Symbian OS mobile phones. Augmented interior design is presented as the main application example.