An adaptive support accessory for providing improved handling, positioning, mounting, and adapting of a mobile device is disclosed. The accessory includes a base attachable to a mobile device and a cap rotationally coupled to the base. The base includes an annular base protrusion centered about an axis of rotation. The cap includes an annular cap protrusion centered about the axis of rotation and disposed adjacent to the annular base protrusion. An aperture formed in the center of the accessory and defining an interior perimetric face provides an engagement feature configured for engaging one or more of a user's fingers, a plug, a mount, and a mounting structure. One or more supports attached to the cap may be configured to engage one or more of a user's fingers, a mount, and a mounting structure. One or more detachably attachable plugs provide additional mounting, adapting, and augmenting the accessory.