Here’s an unboxing of the Enabot Catpal. There is no Android app available for the Catpal. It’s been estimated to release March 2020.
Quest 2 Controller Protection – VRCOVER’s Halo Protector with AMVR Controller Grip
Here’s a quick video that shows what the installation of VRCOVER’s Halo Protector with the AMVR AMVR Controller Grip for the Quest 2. Both fit