Gustaf enables you to use digital sheet music securely and legally. The application offers a host of features that will make life easier for musicians. For instance, Upload you own your scores and store online, various viewing and annotations tools (mark, zoom, edit, notes, transpose, etc.), a metronome function, tuning device, etc. The scores are responsive and automatically adapt to the screen of your device. The Gustaf App will work both online and offline. Gustaf is a product of neoScores, established in July 2013 by musicians for musicians.