There is also Knots3D with a good Android app. https://knots3d.com/ https://knots3d.com/ As a climber what I see is that in general you learn your knots and pr

There is also Knots3D with a good Android app. https://knots3d.com/ https://knots3d.com/ As a climber what I see is that in general you learn your knots and practice them until you can tie them blindfolded, sometimes single handed, sometimes with gloves on!. As a beginner you need probably two or three knots (fig. 8 for tie in, prussik for a rappel backup, double fisherman) As you progress you learn other knots for other purpose and some alternatives. (alpine butterfly, bowline, other friction hicthes, munter mule and so on) Then you stick with the ones you like most or are most versatile and you probably won't need no learn any new knot unless you start doing any new stuff (like start ice climbing if you never done that). So, those resource are good for visual learners but once you learn it and use it regularly you'll probably never forget.