Railroad Island! is an Android app developed by COLOPL, Inc. (東京都渋谷区恵比寿4-20-3 恵比寿ガーデンプレイスタワー11階). Others apps created by COLOPL, Inc. are: Strikeout!, Z Bowling!, Meow Meow Star Acres.

Railroad Island! first became available on 16 May 2013. It is estimated that Railroad Island! has been downloaded between 100000 and 500000 times from the Play Store.

Railroad Island! 1.0.5.1 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 using PowerManager WakeLocks to keep processor from sleeping or screen from dimming.

Allows an application to write to external storage.