[dbolgheroni]

To anyone into knots, I recommend Knots 3D on Android. It is really handy because most people keeps the phone with them all the time. Beautiful and well maintained app. It's not overwhelming, in the sense that it doesn't try to add every existing knot in the same database, it has usage, which gives context, history and specially related knots, which makes it possible to compare different related knots that are usually used for the same thing.

[deceptionatd]

I use them both. I like Knots 3D better, but it's missing some knots that I use. No EStar stopper or Matthew Walker in Knots 3D, for example.

[yakk0]

Knots 3D is also on iOS. It's great and I have used to help teach knots to Scouts quite a few times.