I'm Tyler, CTO of Turing Lace, an Open Source Software Collaborative. Our CMS contains QR Code and Geolocation API Functionality. We require of you, and all our clients, a 50% deposit up-front on our work. We are experienced with Android/GPS hardware and software. Thanks for your time, and I wish you the best of luck, but we certainly do not work for free to prove ourselves. Good luck with that mentality.