This app was mentioned in 3 comments, with an average of 1.00 upvote
I found the Brainium line of card games to have minimally invasive ads and a mute option.
https://play.google.com/store/apps/details?id=com.brainium.blackjack
I bought the premium version of their Freecell. I'm addicted.
Blackjack by Branium, a simple no bs blackjack game with no micro-transactions or annoying ads, in fact the only time it shows ads is when you need more chips. Looks pretty good, even if it's not material/flat. Worth the great low price of free. I wish there was a poker game with a similar no-annoying model