Manual de Nudos is a free application to learn how to perform all kinds of knots. It contains a lot of information about knots, including how to make them, what they are used for, and how to apply them to your daily life.

This app will help you learn the most important knots of all, which will be useful to you in many different ways. You can use them to tie your shoes, to hang out with friends, and so on. You will find all the necessary information to learn how to make any knot in the world. 

It's a very useful app that you should have in your phone or tablet.