This app offers over 200 traditional and popular Christmas carols with lyrics, score, and music. Users can sing, play, and even record themselves or others singing or playing the carols. The sheet music is professionally notated and optimized for smartphones and tablets, allowing users to view, print, and share each carol as a PDF file. With upgrades, users can edit the sheet music, add annotations, and even have a cursor and automatic sheet scrolling. The app also includes a built-in piano that shows the keys being played, making it easy for users to play the songs themselves. Additionally, professional recordings and instrumental arrangements are available for a low price, and users can create their own playlists or have the carols play randomly. The app also offers different country versions, allowing users to download all the lyrics, sheet music, and music for offline use.

The app offers various upgrades, including English, German, French, and Spanish Christmas carols. These upgrades provide additional play-along audio versions for playing or singing solo. For users who play instruments such as trumpet, clarinet, saxophone, horn, or cello, all play-along versions can be transposed. This means that the sheet music can be adjusted to different keys of the scale, making it easier for users to play along with their instruments.