BTT Mobil is a travel and navigation app designed for iPhone users that facilitates the use of public transportation through virtual card functionality. Users can create a virtual card to access various public transport systems, view transportation and stop information, and check schedules. The app also allows users to load and view balances on city transport cards, providing essential information for travel directly on mobile devices.

The app includes several important functions such as QR code passage for virtual cards, real-time bus location tracking, balance inquiry, fare tariffs, and schedule details. It also provides access to authorized vendors and card centers for balance loading, along with features for user communication and feedback. With permissions for internet access, NFC reading, and location services, BTT Mobil ensures a seamless experience for users navigating through urban public transportation.