A developer has created an application that uses Twilio's SMS API, Python, and Airtable to send a user their classes for the day with directions. The application requires a Twilio account, a phone number, an Airtable account, ngrok, and a personal phone number to test it. To set up the project environment, the developer creates a virtual environment, installs necessary packages, and stores sensitive information in a secure location. The application uses Flask to build a server that responds to SMS requests, accesses data from Airtable, and formats the response message. The developer sets up an ngrok tunnel to connect the local server to a public URL and configures the webhook to send messages to the Twilio phone number. Once set up, the application can be run, allowing users to receive their class information via SMS.