Always know what is coming next
The chart scrolls with the music and the next chord is always in view before you need it. That is the difference between reading a song and having already memorised it — you can play along on a first listen.
Harmony
Chords that scroll in time with the song
A static chord sheet tells you which chords are in a song. It does not tell you when they land. SheetMuse puts the chords on the timeline and moves them with the recording, so you are reading ahead instead of counting bars.
Chords taken from the recording
The chords come from the actual audio, not from a transcription someone typed out from memory, so they reflect the version you are listening to — including the turnarounds and substitutions a simplified chart would flatten out.
Guitar, piano, or whatever you play
The same chord information drives guitar voicings, piano shapes and a plain chord chart. Pick the format that matches your instrument rather than translating in your head.
Change the key without losing the chart
Transpose the song and the chords move with it, so a chart in a singer-unfriendly key is one control away from being usable.