App building project for Iphone and Adnroid

We would like to hear from mobile app developers to build a new TEXT to SPEECH app. Without giving too much away we need the new app (compatible for iPhone and android) to convert TEXT to SPEECH but changing some text to alternate words of which there might be 25 in the original design. An example is: TEXT: "I went shopping for APPLES today".... SPEECH CONVERSION: "I went shopping for CARS today." If you are bidding you must provide a list of successful apps you have already built that are on the market - free or paid.