Cricket fitness app for scoring 100s

Looking for developer in iPhone and/or Android to produce a cricket fitness app called BATEX. Essentially BATEX is made up of 4 levels of difficulty. In each of the levels there are 6 stages each with their own associated audio file (so in total there are 24 audio files). It's a fairly simple app. Requirements for work (in rough order of importance): - Ideally made in native form for IoS and Android - Audio player - In app purchasing enabled - Taking process through to app stores - Allowing in-app advertisement - Smartening up graphics (from keynotopia prototype) so respectable, functionality is key though - YouTube links to instructional videos (rather than embedded in app) - Allow posting to social networks (facebook), e.g. when complete all 6 stages of a level in one go (in which case you've completed a hundred) it lets your friends know. - Desirable but non-essential: Allow syncronisation start of audio file between two phones (or more). As BATEX is primarily designed to be completed in pairs, each player would carry his/her own phone so both would need to be able to hear the audio