When the snow’s too wet and the trails are too sloppy, practicing basic outdoor skills like knot-tying is a good way to pass the time. Anyone planning to climb, camp, sail, or fish over the next few months needs to have a working vocabulary of at least a half-dozen knots. The perfect way to learn is through a phone or iPad.
We’ve come a long way from the days of books with hard-to-follow illustrations. The new apps use 3D animations and high-definition videos to show you how to tie the toughest entries. You can watch the process in slow motion, or click through one step at a time. The following apps are accessible to anyone with a few dollars—or even no money at all.