Doesn’t save settings
In OS X Sierra 10.12.4 and 10.12.5, this app doesn’t save its settings, so you have to open it each time you use the camera to reset White Balance, Contrast, and so on. I do hope Logitech fixes that.
In the mean time, check out iGlasses, by eCamm, a similar app for any video camera for the Mac. $20, but has a lot more settings available.
tuqqer about
Logitech Camera Settings, v1.2