Duo-Man Makes the iPhone Duo's Hinge Work Like a Walkman

Indie developer Vidit Bhargava has built Duo-Man, an app that recreates the classic Walkman experience on the iPhone Duo, Apple's first foldable phone. TechCrunch Bhargava announced the project on X as @viditb on September 27, 2026.

Everything centers on the hinge. With the Duo open, Duo-Man uses the 7.6-inch inner foldable display to show a music picker and a cassette. The user chooses music and inserts the tape on screen. Closing the phone moves playback to the 5.4-inch outer display, and listening begins. The physical fold acts as the control.

Bhargava recorded button clicks and static from a real Walkman and built those sounds into the app. That choice gives Duo-Man its skeuomorphic feel, meaning software designed to look and sound like a physical object. The taps, clunks and hiss cover the brief pause during screen switchovers and make going from open to closed feel mechanical rather than like changing app modes.

Apple introduced the iPhone Duo on September 9, 2026, calling it a "breakthrough foldable design." Apple The phone will run iOS 27.1 and goes on sale October 23. Apple Developer As of September 28, pre-orders were expected to begin later in October.

Duo-Man began as a hackathon project. Bhargava built and showed it at the Bitrig hackathon, where it finished second. His X post showing the open-to-pick, close-to-play sequence passed 1.8 million views and close to 10,000 likes, for a prototype with no App Store listing yet.

The plan is to release it as a working player. It will support Apple Music and local files. A later feature will let users wind the on-screen cassette loop with Apple Pencil.

The broader context here is how fast foldable design is shifting from layout to gesture. Early foldable apps treated the big inner screen as extra room, with continuity handled as responsive reflow, or automatic resizing of the layout. Duo-Man treats open and closed as two separate jobs. Picking happens on the large screen. Listening happens on the small one. Closing the phone becomes the transport control.

In my view, that explains why the demo spread quickly among technologists. Foldables have lacked behaviors that only work on a folding phone. Most phone and tablet patterns carry over easily from flat phones. Insert-then-close does not carry over. It needs the hinge, the two screen sizes and the user's hands. It also brings back an older idea from portable audio, that loading music should take a little attention, which can make listening feel more deliberate.

Worth flagging for developers is what that means for state management, or how an app keeps track of what it is doing. This kind of app must keep audio playing across a full screen swap, remember picker choices through fold events, and keep outer-screen controls readable at a glance. Add Pencil input on the cassette reel plus local and streamed sources, and the simple nostalgia object becomes a compact test of media handling, lifecycle discipline and input routing on iOS 27.1. If Bhargava ships cleanly for the October 23 launch, other media developers will have a useful example of hinge-native design.