Why would you include the hangman's know and say it's suitable for use in the theatre as a prop or as a joke? It's a knot designed to kill humans, not to use lightly. The two other very highly rated knot apps I have exclude it. Other than that the videos are low quality animated gifs with no ability to slow or pause them and not always centred on the screen. There are also a lot of inconsistencies in the text - sometimes it's in German, sometimes uppercase, sometimes lowercase. If you don't have attention to detail on that, do you have attention to detail on the knots themselves?
Great App Useful guide!
- knots opened by default