Digital Home Info is a comprehensive lead generation and listing marketing system designed for Realtors to reach more buyers and attract sellers. The system uses Twilio's voice call functionality, allowing prospective buyers to call a toll-free number and listen to a prerecorded message about the listings, with the option to connect directly to the listing agent by pressing 1. Upon receiving a toll-free call or text message, the agent receives an email or text message indicating the calling number and property information, which is also summarized weekly for their convenience. The system offers various resources to help developers build their own lead generation app, including API reference documentation, SDKs, helper libraries, quickstarts, and tutorials.