This app was mentioned in 4 comments, with an average of 1.25 upvotes
Worth to check out:
Pirates and Traders: Gold!
https://play.google.com/store/apps/details?id=com.micabyte.android.pirates.gold
Games from Kairosoft
https://play.google.com/store/apps/developer?id=Kairosoft+Co.,Ltd
Another game is Pirates and Traders, actually challenging. https://play.google.com/store/apps/details?id=com.micabyte.android.pirates.gold