Crystal black clock is an Android app developed by Allfordroid Plus (54 Park Ave Ottawa, ON K2P1B2 Canada).

Crystal black clock first became available on 19 Dec 2011. It is estimated that Crystal black clock has been downloaded between 500000 and 1000000 times from the Play Store.

Crystal black clock 1.7 requires the following permissions:

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.