With the advent of personal digital assistants and in-home, voice-controlled gadgets, voice technologies are on the rise. Building an implementation of Twilio’s Automated Speech Recognition (ASR) service in a simple Ruby on Rails Application enables developers to see the wide-reaching possibilities for other implementations in their own projects. The tutorial focuses on creating a "Feedback Service" that receives, responds to, and stores voice messages from user phone calls—using speech recognition—and then displays them for review at a later time.