Hello
You can take a interview for this,, Hi i am android devleoper and have been devloping softwares from last 5 yrs, I have developed many android app in various domain, and worked with various famous firms ,Your description makes me feel that we could have good business replationship,
You can check my portfolio and there are many project developed but they are my client based,
PS: Since i was on elance and now started on freelance, Since i have a new profile and don't have review so for making this i would be doing the project without any prior bidding cost ,I hope this is all i could support.
We would use agile to be cost effective