Vienna Metro Map by Subway Maps is a free, offline transit system map available on Android. It provides a quick and easy way to navigate the city's public transportation system. With its zoom in, zoom out, and scroll features, it is an essential tool for locals and tourists alike.

The app is user-friendly and simple to use, with clear and concise labeling of stations and routes. It is especially useful for those who do not have access to the internet or do not want to use their mobile data while traveling. The maps are updated regularly, ensuring that users have the most up-to-date information at all times.

However, the app lacks additional features such as trip planning, real-time updates, and schedules, which may be important to some users. Overall, Vienna Metro Map is a reliable and convenient offline guide for navigating Vienna's transit system.