Explore the innovative open-source app "phyphox" in this 56-minute conference talk from the 36C3 event. Learn how to repurpose smartphone sensors as measuring instruments for physics experiments in education, research, and tinkering. Discover practical demonstrations, such as using a phone in a salad spinner to study centripetal acceleration and angular velocity, or employing the barometer to measure elevator speed. Gain insights into available sensors, their limitations, and interfaces for integrating phyphox into other projects. Understand the app's design, which allows for quick setup of experiment configurations and customization through XML format. Delve into the app's potential for physics education at school and university levels, and learn how teachers can create and share specific configurations with students using QR codes.