Cross-Platform Music Playlist App

I'm looking to develop a music playlist recommendation app for both iOS and Android platforms, with integration to Spotify as the sole music source. The app's main feature will be social sharing, allowing users to share their recommendations in response to user questions... (Budget: £250 - £750 GBP, Jobs: Android, App Design, App Development, iOS Development, iPhone, Mobile App Development, PHP, UI / User Interface, User Experience Research)