This app was mentioned in 8 comments, with an average of 2.75 upvotes
Have you tried any of Kairosoft's games? Venture Towns and Edo Towns are two examples of city-building that I fairly enjoyed. Their sim games in general are really well done and have a good balance of challenge and simplicity. It's definitely adapted for mobile devices - it won't have the depth of City Skylines of course, but there's no IAP and it's still a lot of fun.
Although there's only one resource - money. Not sure if you like that or not.
LinkMe: Venture Towns
This is a Kairosoft game, so it will have certain gameplay mechanics that you may/may not like.
EDIT: The bot screwed up. Here's the link
All games by Kairosoft
But Venture Towns is closest to SIM City (though not similar enough).
Cleaned up link: https://play.google.com/store/apps/details?id=net.kairosoft.android.zaibatu3
It should be forbidden to post links with &hl=…&gl=…
parameters. It's such a hassle and inconvenience to anyone on a different language or region.
venture towns from kairosoft
https://play.google.com/store/apps/details?id=net.kairosoft.android.zaibatu3&hl=en
Maybe try Venture Towns by Kairosoft? You basically get to build a city on a map of your choice, planning where residents live and what establishments to place on the map.
I also highly recommend Biz Builder Delux, also by Kairosoft, which is a hybrid between a city builder and business tycoon. You manage a business, and you or your other staff from your corporation can opt to run as mayor to develop the city where your business is to your liking. This game also has a demo you can try called Biz Builder Delux SP so you can try it before buying the full game.
Generally, I recommend looking at the paid/premium Kairosoft games in general because they specialize in simulation/casual games. Just make sure to avoid their freemium games like the plague (example: Dream House Days, Beastie Bay) because those have heavy monetization and advertising and are not worth the time and money.
Links: Venture Towns: https://play.google.com/store/apps/details?id=net.kairosoft.android.zaibatu3
Biz Builder Delux (the full game, paid) https://play.google.com/store/apps/details?id=net.kairosoft.android.townshop_en
Biz Builder Delux SP (demo version) https://play.google.com/store/apps/details?id=net.kairosoft.android.townshopsp