Here's a neutral and interesting summary of the text in one paragraph: This article demonstrates how to use Kotlin to build a simple SMS application with Twilio. The author starts by creating a new Gradle project in IntelliJ, adds Spring Boot and the Twilio Java library as dependencies, and sets up a basic web application. They then create a route that returns a string response when requested, followed by a route that sends an SMS message using the Twilio Java library. Finally, they add a route to reply to incoming text messages sent to their Twilio phone number, which returns a TwiML response in XML format. The author uses ngrok to expose their local web application to the public internet, allowing Twilio to make HTTP requests to it and enabling two-way SMS communication. Throughout the article, the author provides step-by-step instructions and code examples, making it easy for Java developers to learn Kotlin and build their own SMS applications.