This app was mentioned in 3 comments, with an average of 1.67 upvotes
I personally play a lot of Oh!Edo Towns and Venture Towns. Single purchase, and they're more than just city builders, as you also have to worry about people's jobs and building combo's.
Theotown used to be a full game, but they switched to freemium. Still, it's the closest there is to SimCity 2000 on Android, and it's quite playable without paying. (Unlike EA's pile of shit.)
Simcity BuildIt it's freemium. (It's EA.)
Little Big City 2, which is also freemium. Don't be fooled by the name 'Gameloft'. That's Ubisoft. So expect microtransactions for everything.
2020: My Country is similar game, but again, freemium.
Townsmen isn't half bad, but if you're not willing to pay, things take a loooong time. The premium version still makes you wait or pay for speeding things up.
There's also Designer City, which I haven't tried yet. Freemium again.
https://play.google.com/store/apps/details?id=net.kairosoft.android.edotowns&hl=en
This one was my favorite