Type or paste a chart. Unison understands ChordPro and plain chord-over-lyric charts.
Tap Add song. You can:
Type in ChordPro — chords in brackets inline, like `[G]Amazing [C]grace`.
Paste a chart copied from the web (chords on their own line above the words). Unison spots it and offers a Convert button that snaps the chords onto the syllables.
Give it a title with `{title: ...}` and it'll show in your library.