Spin Brush

“Spin Brush” is a drawing app that combines freehand sketching with dynamic
swing-based creation. You can doodle freely on a rotating canvas, or generate
complex patterns through the automatic swinging of multiple editable line
segments. The app supports independent adjustment of each segment’s color,
speed, and thickness, making it ideal for quickly creating decorative motifs,
creative sketches, and rhythm-driven visual artworks.