I just installed Town to city, haven't even gone through the whole tutorial yet but it already invites to cute, good looking towns. As that's it's main selling point, it seems promising.

I also play some Let them trade, which is closer to the economic sim side, but you still get to build cities by districts. Then you have to balance which cities produce what to both balance needs between cities and make sure they can afford the consumables that keep them happy (and the economy running).

It's a breezy casual game with a nice campaign/tutorial, but I find it's not deep enough to keep myself free playing.