As a CamRanger user (and no it is not a ripoff, an more than any other hardware / software is), the tool works well with Android, iOS and Windows. but the Windows implementation is less robust than the other two, and I can't vouch for how well it runs on a Windows tablet, as I haven't tried it.
It is primarily remote control tool that lets one adjust individual camera functions, rather than a image viewer, so much of the screen real estate is taken up by the control functions. As you are using WiFi to communicate, your WiFi link is used to communicate with the camera (i.e. none of the wireless functions to the internet or your local network can be used while using the CamRanger). While I don't have / use it, it also controls a motorized tripod head that lets you rotate, pan and tilt the camera.
Nicely said, it is not an ideal substitute for tethered shooting, and if this is all you want to do with it. Hardwired tethered shooting is really a much better solution, unless the wired connection is going to cause you problems. While I can use it from a smartphone, realistically, a large tablet or touch screen laptop are a lot better suited for this kind of work (this is how I sometimes do product photography in a studio setting). I use a long USB cable from Tethertools for this.
https://www.tethertools.com/