I've strolled around your website and I am quite impressed with the level of development you have made for being a one-man team, I also have looked into your parkcryption app and I don't know if this is just part of the DEMO but you only have a few spots available for your app. I also have notice that you are mostly focus on the development part of your app since its the only thing included in your roadmap but if the business is about parking spaces I would suggest that you also try to focus on finding partners such as hotels, malls, and other commercial spaces that leases their parking space so you have a lot of "supply" for your users. For people who are interested in being one I would suggest that you start including a page dedicated for interested operators/parking lot owners who wants to take part of your project similar to what RingGo did in their website.