I really made it for myself, but I did set up a website last year (pugilis.com) and there is an older version there that I've made available for free. That version does not have the "MatchUps" feature though.
I'm really not a "marketing" guy but this week I started reaching out to some of the YouTube channels via email that cover boxing to see if any would want to partner with me to promote and sell the version with the analytics.
So far no one has got back to me. I think it's fair to say that boxing fans, as a group, may not be very tech savvy, and maybe even a bit intimidated by the idea of using an "app". And they may think my email is a scam. I put a link to the app in the email and they may be reluctant to click on it. Can't say I blame them if that's the case.
I think my next step is to make a video and put it on YouTube so they can see how it works and confirm it really is an app.