A:Unusually and somewhat frustratingly, all the instructions in KnotsGuide are text-based. But we found something charming about the level of detail in this app. Created by a polyglot in Finland, it gives lively history and assiduously-researched data on each knot, such as their efficacy and the difficulty of undoing them. Because of this app, we can now name five different kinds of “running” knots, or knots designed to move.
NUMBER OF KNOTS: 92
Android, iPhone, iPad (free)