Four Days is an Android app developed by FridgeCat Software (FridgeCat Software LLC PO Box 9068 Pittsburgh, PA 15224). Others apps created by FridgeCat Software are: Animal Puzzles, Fish Puzzles.

Four Days first became available on 27 May 2012. It is estimated that Four Days has been downloaded between 500000 and 1000000 times from the Play Store.

Four Days 1.2.2 requires the following permissions:

Allows applications to access information about 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 access to the vibrator.

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

Allows an application to write to external storage.