It was built out of need a few months back when I could not find a 'Simple & Fast Contact Form' for my launch pages and has now grown to more than 4000. As it does not store the email address on the website, it protects against email harvesters. I recently introduced the Pro plan which stores the contact form data, lets you setup an autoresponder, category etc. I do not have any paid users yet.
I would really appreciate any feedback and/or suggestions on general UI & how to market the app.