OldOS app on an iPhone. | Photo by Tom Warren / The Verge.
iOS 4 originally appeared nearly 10 years ago as Apple’s first mobile operating system to drop the iPhone OS naming convention. An 18-year-old developer has now lovingly recreated iOS 4 as an iPhone app, and it’s a beautiful blast from the past. If you never got the chance to use iOS 4, or you’re a fan of the iPhone 3G, OldOS almost flawlessly pulls off the experience of using an iPhone from a decade ago.
OldOS is “designed to be as close to pixel-perfect as possible,” says Zane, the developer behind the app. It’s all built using Apple’s SwiftUI, so it includes buttery smooth animations and even the old iPhone home button that vibrates with haptic feedback to make it feel like a real button.
Apple’s built-in iOS 4 apps have also been…