SimpNote Lite is a free iPhone application developed by 炯龙 吴. It falls under the multimedia category, specifically Music & Radio. SimpNote Lite is designed to help users write songs, compose music, and create music sheets effortlessly.

With SimpNote Lite, users can input numbered notations, allowing for easy composition. The app also offers various rhythm and pitch options, as well as the ability to input lyrics and accidentals. Advanced features such as legato, appoggiatura, and tritone are also available. Users can easily transpose their compositions, transfer beats, and set key signatures and beats.

The program provides a comprehensive set of features for playback, including sound when inputting, playing the notation, playing a selected slice, and tempo setting. Users can also set repeat signatures and choose their desired instrument.

SimpNote Lite offers customization options for design, allowing users to set the sheet background, paper color and alpha, and notation/lyric font color. Users can also adjust the font size to their preference.

Sharing options are also available, including exporting compositions to images or MIDI files, network printing, and sharing via Airdrop or other apps.