Flowin is a concept developed for physical therapy with a focus on the lower back. As you can see, there is no isolated movements of the lumbar spine, but the exercises are much broader. Therefore, naturally the exercises also can be used in entirely different purposes, such as knee rehab, general core stability, etc.
These exercises can easily be found by typing "Flowin" in the search box in GoMobilus. Refine your search by entering for example body part e.g. "Shoulder".