It complains that my screen is too small and "a tablet or computer shows the whole city hall", whatever the city hall is, which I obviously don't know yet. But I am on a tablet. I think what it means is "you must hold your tablet in portrait", otherwise the data views button gets hidden underneath the end of the other toolbar.

Further gripes: I don't understand what I'm seeing. The first "data view" shows a heat map of population, but which are the dense parts? Is beige denser than blue which is denser than icy grey? Where's the actual population figure for that tile, is it "district population"? That seems to be per-tile, so is a building a district? Why does the park have a population of 49, and why do the 49 people living in the park give me a mayoral approval rating of 56%?