I know you want to tell us all about the amazing (sincerely!) stuff under the hood, but to users, the interface is the product.
I'm into rockets, and clicked the link earlier today. I shared the suggestor's view, but didn't bother to post. I came back now, saw the comment thread had updated significantly, noticed that OP had addressed the suggestion, clicked again -- and noticed, hey wow, there are cool screenshots now, these are a lot more interesting, this is better than I thought!
Usually when there's no screenshot or video for GUI apps I assume it's because the creator is not proud of it, so a sign that the UI will be shit.
A short looping video of the software in action might also be good. But a lot more effort.
If anyone is curious of what I expect (in page order top to bottom)
Screenshot of complete product ui with description (showing complete UI)
Button to the download/buy product.
Header/tagline description of feature below:
Screenshot of individual parts of the UI (These are more often then not videos these days/gifs). Description of these screenshots
Buttons to expand to another page to learn more.
Bluntly, Just copy what other companies are doing. They are doing it because it works.
Example
> on the home page
and I meant it