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 fully test with the cameras that I own myself but I do try to test against other cameras too where possible.