I am John McKerrell, the developer behind CamViewer.
I have no affiliation with any of the manufacturers of the cameras although I am in contact with a few of them.
I hope you enjoy using the app, I try to make an app that I would like to use. This usually results in a good interface that people are happy to use although there can be some variances. Day-to-day I can only test with the cameras that I own myself but I do have a growing test team who are providing feedback on new versions with a more varied selection of cameras. If you're interested in joining this group then sign up here