If a phone rings and there’s no one there to answer it, does it make a sound?` This question highlights the importance of answering calls in a timely manner, particularly for businesses that rely on inbound leads. Netguru's Callio app uses Twilio's voice API to forward incoming calls to a Slack channel, allowing the team to track and manage client communications more efficiently. Lukasz Ozimek, the software engineer behind Callio, initially estimated it would take three months to build the project but completed it in just two weeks. The app is now available on GitHub for developers to build their own version, showcasing its simplicity and ease of use. By leveraging Twilio's voice API and Ruby programming language, Callio enables businesses to scale their consulting work while providing a local experience for clients worldwide.