Explore Taipei is a highly recommended subway map app for travelers visiting Taipei. Endorsed by CNN and Lonely Planet, this app provides an up-to-date metro map that includes all the metro lines in Taipei. One of its key features is that it works offline, allowing users to access the map and plan their journeys without an internet connection.

The app also offers a convenient route-planner, making it easy for users to get route and time information for any journey with just three taps. Additionally, the "Find my nearest station" feature uses GPS to display a list of the closest metro stations to the user's current location.

Explore Taipei includes street maps for every station, helping users navigate their surroundings and find metro exits and nearby streets. The app is designed to be user-friendly, with a specially redesigned interface for iPhone X and iPad.

While the app is free to download and use, it does have ads. Users have the option to upgrade to VIP features, which not only remove ads but also provide additional benefits such as accurate prices for every journey, first/last train times, offline street maps, tips at every station, and ongoing support for future development.

Overall, Explore Taipei is a reliable and comprehensive subway map app that offers essential features for travelers exploring Taipei's metro system.