This sample app integrates both Twilio Voice and Twilio SMS by allowing customers to call a number to hear recorded information, before following it up with an SMS message. Using a treasure hunt as an example:

• A participant calls your phone number
• The app accepts the incoming phone call
• Using the <Say> TwiML verb, an automated message is said to the participant in the call: "Thanks for calling! We just sent you a text with a clue."
• The app then sends the participant a follow-up text message: "There's always money in the banana stand."