an incredibly useful app for those new to rio de janeiro's subway system, metrô fácil offers detailed information about the rio metrô enabling users to plan their journey before going underground.

this app was launched by metrô rio, and is accessible in both portuguese and english, depending on the system - included in the app is a full map of the metrô, and its stations, as well as points of integration, and estimated travel times.

it has various helpful attributes, including a journey plan based on the neighborhood that the user is in - more information on this page, or via i-tunes here.