Curling I/O guides, FAQ, tutorials, and feature forums. Curling I/O is a central online curling registration and management system for Member Associations and Clubs that incorporates athlete profiles, scoring and results (formerly known as “CurlCast”), participant forms, league management, and more, together in one platform. No installations, no special hardware/software requirements. Just a web-browser and an internet connection. Report easily from one database to secure funding and improve your services.