but switching the city in the list doesn't work for me, I can't see the median income or median income / median apartment rent either (I tried on Firefox and Chrome on Fedora)
To go to interesting cities I had to enter them manually in the URL
Edit: This should be fixed now. Anyone, please let me know if you're still having issues.
However I tried a random city : Helena-West Helena, AR https://kwelia.com/maps/cbsa_census_tract/Helena-West%20Hele...
and it says "Uh-oh! Looks like we don't have enough data for this MSA yet. Please try another selection." , fine, but the problem is the list of cities has now disappeared.
As ars commented, in the future if you could have something that finds out in which area you are currently looking, and loads automatically the data for the area, that would be even better!