Blockoon is an Android app developed by zinine (Twosun world building 221 Pangyoyeok-ro Bundang-gu Seongnam-si Kyungki-do). Others apps created by zinine are: Shanghai Free, Sichuan Free.

Blockoon first became available on 12 Dec 2011. It is estimated that Blockoon has been downloaded between 100000 and 500000 times from the Play Store.

Blockoon 2.8.5 requires the following permissions:

Allows applications to access information about networks.

Allows applications to access information about Wi-Fi networks.

Allows applications to open network sockets.

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 access to the vibrator.

Allows an application to write to external storage.