If you purchase tools form Appsumo then you have more than likely purchased tools that you make think at first thought are like TextFocus. This tool is very different than any other tool you have seen here before. Most give you the Arefs, SEMrush comparisons or insert some other major SEO brand here. TextFocus is a great complimentary to those other major players. They are doing something a little deeper where they are looking underneath the hood and doing a full inspection of what crawlers are looking for. Keywords are all the rage but is the content you are putting together making sense for a google crawler to send traffic there. Here is the tool in action (video) right along side some past and present SEO tools here on Appsumo
https://youtu.be/bd8MynyWLGc

CONS
I like what the tool is doing but my only wish is that it gives me more information on what the test results are giving me. When it says you need a tune up here tell me why or what it will do to improve me score. Better yet tell me if I add titles and height and width to my photos tell me how much percentage my points will go up. Not only that give me a dictionary of terms and what they mean to help me become a better writer.

PROS
I love that I can drop in any link from any competitor and see what they are doing underneath the hood. This is a nice little sneaky hack that I would say is worth even one code or token.

Nicely built just give me more definitions and help me as a writer become better and more aware and I would be so happy.