二胡调音大师 is a new tuning app specifically designed for the iPhone. This app allows users to tune their erhu, a traditional Chinese musical instrument, with ease and precision. With three different tuning interfaces to choose from, users can select the one that best suits their preferences. The app also integrates a professional metronome function, providing users with a convenient tool to practice their rhythm. Additionally, users have the option to choose from multiple tuning modes, ensuring that they can achieve the desired sound quality. Best of all, all the features of 二胡调音大师 are available for free and without any restrictions. If you're an erhu player looking for a reliable tuning app, give 二胡调音大师 a try today.