Music Notation / App

As a conposer, how to catch the fleeting inspiration?
This design ,which is called MUSIC NOTATION,is an app for one who want to compose music. You can use this app on your phone or iPad. When you play the piano, put your device near the piano and open the MUSIC NOTATION. It will record every note. You can modify your music scores after you save your music. Another feature is the paperless design. The music notation is a huge music libraries. You can find any music you want here, not only  your own, but also which is on the network. Through input the music  name or a melody can you find it. By this way, we can save the music paper.