Symptoms

In comparison to iPhone 4K captured images, Android device's results look insufficient. 

Image capture with low quality or low resolution. 

Cause

Due to software specific iPhone capture is locked to 4K minimum, however, that does not work for Android as it may switch to the lowest supported resolution if otherwise is not specified in the code. 

Resolution

The general approach here will be forcing all capture to one resolution e.g. 4K by setting the minCameraResolution to the desired value e.g. 1200 will be Full HD and 2000 presumably 4K 

As an additional option preferredCameraResolution can be changed as well in this case, the software will try using this resolution preferably, and changing to the maximum supported in the case specified is not possible. 

More about IWebCapture can be found here: IWebCapture interface