The G Soft team are knocking out the casual games at the moment - Blackjack Mobile 'does what it says on the tin', no more and no less, with no frills. You're straight into a standard Blackjack game with nothing in the way of ambience or atmosphere. This is fine for a card game though, if all you're after is a quick distraction from the day. Screenshots and link below.
Here's the game in action:
All fairly basic, but the gameplay's here, along with nice big buttons to control the action. Note the support of usual Blackjack rules like splitting doubled cards in order to play two hands at once.
There's G Soft's usual (somewhat garish) help system, plus full-screen ads every so often, to enable the game to stay free.
Again, the usual G Soft menu furniture, in this swipe down panel - it works well though. (Right) Having to tap through this dialog every single hand gets a little tiresome. Ideally this should just go away after a second or so, or perhaps be an option.