We provide an oyster card-like ticketing system without additional infrastructure: easy to scale, cost-efficient and simple access for the end-user. Through machine learning on smartphone sensor data we passively detect ten different transport types in the background. By integrating APIs and further data sources, we provide a fully software-based ticketing technology that works as a check-in/be-out solution. Our platform is designed to easily integrate public transportation and other mobility services such as car-sharing solutions. It enables Mobility-as-a-Service in a pay-as-you-go manner, not forcing the user to plan their future mobility demand. Besides increasing the attractiveness of the transport system through state-of-the-art ticketing, our platform generates accurate multimodal data that can be used to improve the existing transport system: optimize timetables and routes, enable flexible pricing schemes, and finally focus the mobility system around the user.