28 new knots, 36 in all: from the Alpine Butterfly Loop and the Trucker's Hitch to the Turk's Head and the Monkey's Fist.
9 new situations, 23 in all, like tensioning a line, taking a boat in tow and coiling a line.
The 8 knots from version 1.0 stay free. A one-time purchase unlocks the other 28 and every knot added later. No subscription.