Here is a summary of the article in one paragraph: Making phone calls programmatically with Twilio from an iOS app can be done safely by running the app on the server using Swift. To achieve this, you need to use the Twilio client-side library, which stores sensitive credentials, or use the Twilio REST API directly. The author recommends using the latter approach and provides a step-by-step guide on how to make a phone call with Twilio from a Swift server-side application. This involves creating a TwiML Bin, which is a set of instructions that tells Twilio what to do with a phone call or how to respond to a text message. The author also discusses using the Swift Package Manager to handle dependencies and provides example code for making a phone call with Twilio from a Swift server-side application.