BlackJack 21 is an Android app developed by Top Trend Interactive (RM1812 No.160 CONNAUGHT ROAD WEST HONGKONG,).

BlackJack 21 first became available on 10 Sep 2013. It is estimated that BlackJack 21 has been downloaded between 500000 and 1000000 times from the Play Store.

BlackJack 21 1.7.6 requires the following permissions:

Allows applications to access information about networks.

Allows applications to access information about Wi-Fi networks.

Allows applications to change network connectivity state.

Allows applications to change Wi-Fi connectivity state.

Allows access to the list of accounts in the Accounts Service.

Allows an application to install a shortcut in Launcher.

Allows applications to open network sockets.

Allows an application to call killBackgroundProcesses(String).

Allows an application to read from external storage.

Allows read only access to phone state, including the phone number of the device, current cellular network information, the status of any ongoing calls, and a list of any PhoneAccounts registered on the device.

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

Allows an application to write to external storage.

Allows an application to read or write the system settings.