sorry for inserting my own product into the conversation, but I am running out of ways to understand the failure of my product.

I wrote a prototyping application (https://www.ux-app.com/dev/editor). It's on life support at the moment and brings in only a couple hundred $ per month.

I think it's a lot more powerful than inVision and many of the other successful tools. If you have time then add a mobile table view to see how powerful the editor is.

Why is it failing so hard? Any ideas?

Thanks, Eli