The demo is very fast, I just click a button and I'm in the middle of creating an invoice in a blink of an eye and it even produces the PDF right away. Good job.

I didn't find the pricing information anywhere on the site, however. Even after I clicked Sign Up there was no mention of how much it costs or if it's free, so I went back to the front page searching for that information and didn't find it there either.

EDIT: I noticed the box telling it's 100% free now that I had missed when I arrived at the site as I just quickly scanned it and then clicked the Invoice Now button. How are you planning to monetize it? Why should I believe it will always be free?