Knots 3D (App Store): Tie, untie and rotate 93 knots with your finger in 3D! Knots 3D, our popular how-to knot app, will give you a whole new perspective on knots! Have you ever wondered what a knot looks like rotated 40° or maybe 90°? Or maybe you want to see what a Trilene knot … Continue reading Knots 3D