You can build a simple SMS survey app using Twilio Studio without any coding, utilizing its drag-and-drop editor to create a workflow for your app. To start, navigate to Twilio Studio and select an existing template or create a new one, then configure the flow by adding and editing survey questions, setting up triggers, and connecting widgets with arrows. The flow should validate responses and log them, while sending thank-you messages to respondents. Once built, connect the survey to a Twilio phone number and test it to ensure it works properly. Finally, you can analyze the results in Google Sheets or other tools without requiring any original coding.