Hi,
Just to give you a background, I manage a mobile app development studio in the Philippines. We have been developing on iOS since the appstore was launched in 2008 and on Android since 2011 Our team is composed of talented developers, artists & testers who practice agile method throughout the entire development process in our every project. We take pride not only of our high level of technical expertise but also of our strong commitment to our clients. Much more, our list of clients extends to the world particularly in US, Europe, and APAC region. The diversity of our clients is a testament of our capability to develop world-class apps.
The app you wish to develop is very promising and the fact that we match on your required skills makes it more interesting for me. Our engineers can definitely make all the specifications and features possible.
Also, here's a link to some of the apps we have developed http://www.mediafire.com/view/2imy5by2l6u61os/Smartwave+Studios%27+UI-UX+Portfolio.pdf. Please take a closer look to the shopping apps we have developed for some of the features you require on your app. I am looking forward to discuss this project with you and hopefully have a mutually beneficial partnership in developing your app.
You may check our profile at freelancer http://www.freelancer.com/u/softwaresamurai.html. Feel free to ask me questions and I'd be glad to accommodate you.
Best,
Chindee