NthCaller by Tim Lytle has won the Twilio "Push" developer contest with its innovative call screening app that allows users to easily queue and screen multiple calls in real-time, utilizing Twilio's API for seamless integration. The app is designed to be user-friendly, with a simple web interface that updates dynamically as calls come in, and can be used as a starting point for more complex applications such as virtual switchboards or number routing services. Tim Lytle, the developer behind NthCaller, has previously won a Twilio contest with DropMail and credits Twilio's API for being "ridiculously simple" to work with, which led him to start developing with the platform.