Swift is a programming language created by Apple in 2014 to build software for its devices. It replaced the older Objective-C as the recommended way to make native apps for iPhone, iPad, Mac, Apple Watch and Apple TV, and it was designed to be safer and easier to read than what came before.
Picture writing instructions for a very literal assistant who only understands a specific dialect. Swift is the dialect Apple’s devices speak most fluently. Because the language and the hardware come from the same company, apps written in Swift tend to feel fast and fit right in with the rest of the system, with smooth animations and access to features like the camera or Face ID.
A big reason developers like Swift is its focus on catching mistakes early. The language is strict about types and flags many common bugs while you write, rather than letting them surface after launch. That strictness sounds annoying at first. In practice it means fewer crashes in the hands of real users. Swift also pairs with SwiftUI, Apple’s modern way of describing screens, so a small team can build a clean interface without wrestling with old, verbose code. It is open-source and modern, which is why it has steadily become the default for serious Apple development, while cross-platform tools like Flutter compete when a project also needs Android from one codebase. The trade-off is the usual one: native Swift gives you the smoothest result on Apple devices, and a shared codebase saves money when you must ship everywhere at once.
At TopDevs we build in Swift when a client wants a polished native iOS app that uses the full power of the iPhone rather than a one-size-fits-all wrapper.
