Metro ES - Madrid Barcelona is a travel and navigation application available for iPhone users. This app provides offline access to subway maps of Madrid, Barcelona, and Bilbao, allowing users to navigate these cities without requiring an internet connection. The main features of the app include an AR view, one-click access to a fullscreen map, double-click for simple zooming, one-finger slide for map movement, two-finger slide for full zoom, and user location identification.

Additionally, Metro ES offers a premium subscription at US$4.49 per month after a 7-day free trial period. The subscription automatically renews unless canceled 24 hours before the current period ends. Users can manage their subscription through the App Store. For more details, refer to the app's terms of use and privacy policy.