On the Tverb webpage, there is a section entitled Tverb Users. In this section, there is a picture of "Drew ofthe Drew", holding an H9, which seems to imply Tverb is available for the H9. Yet I am not able to find it in H9 Control under Store?
Artists often provide their own photos. In this case, Drew ofthe Drew chose to pose with his H9. He's also an avid plug-ins user and has contributed various videos, including this one for Tverb: