I have four knot apps that I have purchased and this is the one I go to first because the video is superior since it shows only the ropes themselves moving slowly without hands being in the way.
I use this for fishing and for teaching others, especially kids, to tie knots.
I recently used it with a troop of Boy Scouts my fishing club was helping to earn a fishing merit badge to illustrate the can-be-complicated Nail Knot.
The written uses for each knot is also very helpful.
I only wish they would add more knots. Camping and boating knots would be cool (but then theyd have to change the name!). The app Knot Guide has the most knots and great step by step photos, but not video animation. Now if the two would marry they would have a six star app.
nbly about Animated Fishing Knots, v1.3.1