Hard to judge what is wrong/could be better as I couldn't gather what your actual project is. Maybe there are some obvious glaring mistakes on the landing page or something that scares people off?
Or it might just be trying to solve a problem that people don't actually have, or communicated poorly what problem it solves. I tend to see these being the most common reasons people don't even sign up.
I won't comment on the project itself, but more about your mindset. I don't think "converting" is your issue, but your mindset is getting in the way of yourself. You see it as a no-brainer yet don't understand why people aren't buying, but you're 100% convinced you're right and solves the right problem in the right way. But clearly, if it did, you wouldn't even have to do sales, take a look at anubis for a project that is doing the very same but sells itself.
So I guess my best tip to you is to look inwards, be humble, be honest and try to enter a "learning" mode instead of "telling/convinced" mode that you seem to currently be in.