Basic IVR like System for Android with Voice Mail and Calling Screening

Please quote days and cost. A communication tool for when you're sitting in the dentist's office or quiet section of the train, and you can listen, but not communicate via voice. Instead you will click some buttons on your phone to give pre-recorded responses like: - Yes - No - Please rephrase your question in the form of a Yes/No Question - OK - Thank you. - Good Bye It will also allow the caller to leave a voicemail, and the listener to screen all calls and answer the phone at any point of the call. Requirements: Ability to communicate by Google Hangouts for at least two hours a week from 8am to 9pm New York time. The deliverables of this project will include the source code and assistance in helping me to build in Eclipse or Android Studio (your choice).