Any way to run this on a shared hosting with PHP/MySQL? If that works out somehow I would give this a try over Matomo, which is just "too big" for my use case.
I was thinking that it could be a filter on a segment, but it doesn't look possible when I tried the demo. Otherwise, I really like the look of usertrack.
There is no way to compare two date intervals in the UI yet, but the code is actually there, I only have to add some UI for it.
I was thinking to just add a checkbox to enable "compare with last interval", so whatever segments you have selected, when the checkbox is enabled you would also see graphs of the previous period. Eg. You have chosen "last 2 weeks", it would comapre "last 2 weeks" with "minus 4 weeks, minus 2 weeks".
Yes, I think that would work really well as it would be simple to understand. You could also have the option to only show the differences or at least highlight the differences as that is what you are probably trying to see.
I am planning to implement both of those features really soon (this month), but I am currently working on releasing a simpler analytics platform for WordPress, based on userTrack (https://wplytic.com), as the current pricing might be a bit too high for some WordPress users and they might also not need all the advances features of userTrack (heatmaps, session recordings, multi-user, multi-domains, A/B tests, etc).