Yeah, good question. I wanted to do that, but GoAccess is a web server log parser and doesn't support custom fields (you don't get screen resolution via web log

Yeah, good question. I wanted to do that, but GoAccess is a web server log parser and doesn't support custom fields (you don't get screen resolution via web logs, so it kinda makes sense). See: https://goaccess.io/man https://goaccess.io/man I could probably hack it and overload different HTTP status codes to mean different screen sizes or something, but I didn't consider device size to be important for me. GoAccess does break down the User-Agent into OS, so I can see mobile usage via the "iOS" and "Android" OS usage. Breakdown for my site: Windows 24%, iOS 22%, macOS 19%, Android 20%, Linux 11%, other 4%. So mobile usage is probably about 45%.