Castby is a new location-based social network for mobile devices. Castby allows users to capture a photo or video events and moments then publish them, publicly or privately, on their own maps for friends or the world to see. Users can enjoy exploring the world map or other followed friends' maps and leave location-based interactions such as Feelings and Supports. By using Castby, you will know what is happening around your area or at any point in the world instantly.

Castby focuses on becoming a highly trusted source of past or current world and personal events.