A Cassette App Might Be the iPhone Duo's First Must-Have Feature

Apple hasn't confirmed a folding, dual-screen iPhone, but that hasn't stopped developers from imagining what people might actually do with one. The latest example: an app that turns the rumored iPhone Duo into a working recreation of the Sony Walkman, right down to the ritual of inserting a cassette.

The concept works like this. Open the device flat and one half of the screen displays a library of digital "cassette tapes," each styled after the album art and plastic shells of the format's heyday. Tap one to select it, and the app shows it sliding into a virtual tape deck. Fold the phone shut the way a real Walkman clamshell closes, and the music starts playing, with the outer screen switching to a playback display showing spinning reels, a running timer, and physical-style buttons for play, pause, and fast-forward.

It's a small piece of software, but it points to something bigger: dual-screen and foldable phones have struggled for a decade to justify their extra hinge and cost with anything beyond bigger multitasking windows. A folding iPhone would need an answer to the obvious question of what a second screen and a hinge are actually for, beyond spreadsheets and split-screen video calls. Recreating a beloved physical ritual, rather than just cramming more app windows onto more glass, is exactly the kind of idea that could make a fold feel like a feature rather than a gimmick.

The Walkman comparison is also not accidental. Nostalgia apps that mimic tactile, pre-smartphone objects, film cameras, vinyl turntables, physical keyboards, have consistently found audiences on the App Store, and folding the phone shut to "start" music taps into the same instinct that makes people miss the click of a cassette door or the drop of a record needle. A hinge that can be opened and closed as an actual input gesture, rather than just a way to change screen size, is something flat iPhones simply cannot offer.

Apple has not said when, or whether, an iPhone Duo or foldable iPhone will actually ship, and recent supply chain reporting has pointed to a folding iPhone arriving in some form within the next year or two. Until then, this cassette player remains a concept rather than something available for download, built by developers betting on hardware Apple hasn't announced. But it's a useful reminder that the appeal of a foldable iPhone may end up having less to do with raw screen size and more to do with small, tactile moments like this one, the kind that make a hinge feel like it was worth including at all.