弦外 is a free iPhone application developed by 惟楚 陈. It falls under the category of Multimedia, specifically Music & Radio. This app allows users to enjoy the pleasure of playing musical instruments anytime and anywhere. With its simple yet appealing design, 弦外 offers a wide range of sound variations and a vast collection of sheet music for users to explore. Additionally, users can also share their own compositions with friends, adding a social element to the app.

The user-friendly interface of 弦外 makes it accessible to both beginners and experienced musicians. The app provides an immersive experience, allowing users to experiment with different instruments and create beautiful melodies. Whether you are a music enthusiast or a professional musician, 弦外 offers a convenient and enjoyable way to play and create music on the go.