Blackjack 21 is an Android app developed by Infimosoft (Barcelos Portugal).

Blackjack 21 first became available on 27 Jul 2012. It is estimated that Blackjack 21 has been downloaded between 100000 and 500000 times from the Play Store.

Blackjack 21 4.1.3 requires the following permissions:

Allows applications to access information about networks.

Allows applications to open network sockets.

Allows using PowerManager WakeLocks to keep processor from sleeping or screen from dimming.