title: Which audio format can be recorded and played back by iPhone and Android?
body: <p>I am designing an app that can record short audio files on iPhone and Android that can be played back on both platforms, as well as hopefully any other smartphone.  </p>
  
  <p>Right now I'm using *.caf with the iLBC codec, as I know the iPhone does not encode mp3. </p>
  
  <p>Is there a file format/codec that I should use in this case?</p>