MIOPS Mobile Remote Smartphone Controllable Camera Trigger with S1 Cable for Sony, Konica Minolta, and Hasselblad Cameras

Works as advertised, and is the app is great, but the hot shoe attachment (which is just to hold the device, it serves no other function as this device is wired with a cord to the camera) does not fit into the hot shoe on a Sony A7RIII. It looks like the plastic around it is not precisely cut and has some extra pieces from the molding process of the plastic case, making it too big to slide into the hotshoe. In order to get it to stay on the hotshoe as opposed to having it just dangle, you'd have to use an additional adapter or something similar.

I purchased this for a Sony A7III with the "Sony S1" cable. Apparently there is more than one cable for Sony cameras and this was not clear in the listing.