The Violin App app for iPhone and iPad

Virtual Violin: You can rotate, zoom and even open the body of the Virtual Violin to discover the different parts of the violin. You can open a description of each part when selected and read about the function and use. If you select the strings, you can play the sounds of the open strings.
Chromatic Tuner: The tuner in this app is optimized for the frequency range of the violin. Even high notes will be recognized reliably.
violin courses: Through the app you can access the violin courses from Simon Streuff with a discount of 15%. That is a way to support the team behind The Violin App