Defender is an Android app developed by DroidHen (3 - 27 Canton Road, Tsim Sha Tsui, HK, 九龍 Hong Kong).

Defender first became available on 18 Dec 2011. It is estimated that Defender has been downloaded between 10000000 and 50000000 times from the Play Store.

Defender 1.1.9 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 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 an application to write to external storage.