Does not work off-line such as on planes

Seems like a good game with nice graphics but the ad pop ups are very annoying. Plus, it will not play when you are disconnected from the WiFi or phone network such as when on a plane where this is not allowed.
It tries to connect to its host site frequently during play and especially at startup, thus preventing its play. As it is always connecting to its host site, I suspect it may be transferring your personal data to it. I have uninstalled it just in case.

BrentGoss about 21 Pro: Blackjack Multi-Hand