This app was mentioned in 2 comments, with an average of 1.50 upvotes
I play a ton of board/ card games, in real life and app versions.
I agree with Small Worlds, but it might be a little too involved for a pub... along those same lines are Ascension and Puerto Rico.
I'd recommend Hey, That's My Fish. It has simple mechanics and no reading, but is fun and challenging. https://play.google.com/store/apps/details?id=com.fantasyflightgames.htmf
Linkme: ascension, Puerto Rico