Drop chords anywhere on the timeline — not just once a bar.
Tap a chord below, then tap a slot (or several in a row) on the timeline to place it. Drag the small grips on the sides of a placed chord to stretch or shrink it. Tap the middle of a chord to clear it.
Fit with the melody (a guide, not a rule — trust your ear)
Notes outside the chord — tap a red note above to hear it against its chord