Second, stars don't denote usage or downloading of the code or app. Lots of people use them more as bookmarks which show interest but not much more.

I think if you go back a few years people really did think of GitHub stars as some kind of social proof. That seems to have largely come back around now, and while it's a sign that the project has some attention, there are better ways to see that it is active.

None of that is to devalue the work you've done. It does look like a nice and well thought through application.