DerbyDays is an Android app developed by Com2uS USA (12F, A-dong, BYC Highcity B/D, 371-17 Gasan-dong, Geumcheon-gu, Seoul, Korea 153-803). Others apps created by Com2uS USA are: Homerun Battle 3D FREE, Ace Fishing: Wild Catch, Demonic Savior, Golf Star, HeroesWar, Homerun Battle 2, Knights N Squires, The World of Magic, Inotia3, Inotia4, Divine Girls, Tiny Farm, Tower Defense.

DerbyDays first became available on 02 Aug 2012. DerbyDays has been awarded with the "Top Developer" badge. It is estimated that DerbyDays has been downloaded between 1000000 and 5000000 times from the Play Store.

DerbyDays 2.3.4 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 applications to open network sockets.

Allows an application to read the user's contacts data.

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 update device statistics.

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.