Unfortunately there's no API access to Siri's text to speech (and Siri depends on a live internet connection) for a less robotic voice, and the TTS libraries available for the iPhone that have less robotic voices aren't cheap (about $325) so I have a hard time justifying the cost unless I make a paid version of the app with better voices that I can sell to at least 100 people. If there's sufficient interest once I crank this through the Beta process and the Apple store I'll do it (the demo version of the libraries I tried definitely had a much better voice).

Peter+