A:Some apps drill down on a specific area of the craft, and Sailing World’s software is a boon for anyone who needs to tie sea-worthy knots. We liked the teaching style of having both animation and video on the same knot; in conjunction, the two methods made it easy to practice our bowlines or learn to apply whipping to the end of a rope. There were a few minor glitches, however, such as when an animation inexplicably presented a different knot than its accompanying video.
NUMBER OF KNOTS: 26
iPad and iPhone ($3.99)