TechCrunch tested a set of Duo-optimized apps on a review unit provided by Apple, and the list is the strongest answer yet to the Duo’s biggest early question: what is a folding iPhone actually for? These clever apps show off the iPhone Duo potential better than any spec sheet, because they treat two screens as a design material.
Context matters. The Duo went on sale on October 23, 2026, and many everyday apps were not optimized at launch. Unadapted apps could sit surrounded by black bars or need a tap to enlarge. The apps below are the exception.
What ties them together is simple. The best of these apps do not just display correctly on a foldable. They use two displays of different sizes, and a phone that can sit closed, open like a book, propped in tent mode, or open like a laptop.
The Short Version
- TechCrunch tested the apps on an Apple review unit; PetaTech24 did not test them.
- Netflix leads the launch partners: Clips outside, full video inside.
- Deck-Man and Tiny Computers turn retro nostalgia into hinged-phone-only ideas.
- Wakeout and Flighty adapt to every pose, from tent mode to laptop mode.
- The catch: most everyday apps were still unoptimized at launch, so the iPhone Duo potential depends on developers following these examples.
iPhone Duo Potential: Netflix and the Two-Screen Watch
Netflix is one of Apple’s hand-picked partners for the Duo launch, and its app was Duo-optimized by launch day. On the outer screen you can scroll through Netflix’s short-form, TikTok-like Clips. Open the device and the video continues on the larger inner display, adapting automatically. This is the iPhone Duo potential in daily use: a small screen for browsing and a big screen for watching.
iPhone Duo Potential: Retro Fun From Deck-Man and Tiny Computers
Deck-Man, previously known as Duo-Man, is the app TechCrunch credits as the first that made the author want a Duo. Indie developer Vidit Bhargava built it at a hackathon, reimagining the cassette player as a digital experience with retro appeal. You browse albums as cassettes, load one into the player, and control playback with play, pause, fast-forward, and rewind, with authentic sounds. Open, the cassette plays on one side of the screen. Closed, the interface looks like the front of a Walkman. This is the iPhone Duo potential at its most playful: an idea that could only exist on a hinged phone.
Tiny Computers plays the same retro note in a different key. Designed specifically for the Duo, it ships with 10 retro computers: the Macintosh, Commodore 64, IBM PC, Amiga 500, Windows 95, ThinkPad, iMac G3, iBook G3, PowerBook G4, and Windows XP. In laptop mode you get clicking keyboards, working command lines, paint programs, floppy disks, and desktop games, plus hidden files and secret commands. There are no ads, subscriptions, or in-app purchases, just a $3.99 one-time fee in USD. No EUR price was stated in the source, so none is given here.
A Notebook That Closes Like a Book
TypeDraw is designed as a personal notebook, something like a virtual Moleskine. Inside, you can type using a font based on your own handwriting, or pick from one of a dozen fonts designed by its creator, Phil Traut. Choose lined, grid, or dotted paper, pick an ink color, and draw or sketch alongside handwritten text. Pages curl as you flip through them, and you can pull on the elastic band for a twang animation. It is a gentle kind of iPhone Duo potential, and it only works because the hardware itself closes like a book.
Wakeout and Flighty Use Every Pose
Wakeout and Flighty show the iPhone Duo potential in daily routines, not just in demos. Wakeout, a workout app and former Apple App of the Year winner, offers mini movement breaks that feel more like games than exercise. Open like a book, movement game videos sit on one side. Open like a laptop and the videos shift to the vertical screen. In tent mode, propped on a desk, the videos are easy to follow during a work break. When closed, the navigation tabs become a slim side menu beside the camera.
Flighty, the Apple Design Award-winning travel app, covers gate updates, delays, airport conditions, and aircraft type. On the open Duo, its map spreads to the edges, showing more of your flight’s path on a globe that spins under your fingertips. It also works in split screen, so you can track a flight while doing something else. Then there is En Route Mode, added just for the Duo: fold the phone into the tent shape, place it on a tray table, and watch flight progress over Wi-Fi while you listen to music or read.
Sky Guide, MD Vinyl and Pico Cam
Sky Guide shows a quieter kind of iPhone Duo potential. It is the classic stargazing app people open outdoors to identify stars and planets. Apple gave it a shoutout in its press release about Duo-optimized apps, and the reason is easy to see: the larger unfolded display gives a more immersive, edge-to-edge sky map that moves as your position and orientation change.
MD Vinyl did not disappoint as a Duo-optimized music player. Its widget already sits on a regular iPhone home screen, with a tiny spinning record plus song title, artist, and controls. On the Duo, the virtual record uses more of the screen, and you can pick up the player’s arm and place it on the spinning disk to start the music, or remove it to stop it. Pico Cam, a tiny playful camera app, makes virtual Polaroid-style pictures. On a regular iPhone, pictures eject from the Dynamic Island, and you shake a picture to develop it faster. On the Duo it works open and closed, with the closed phone giving more gallery space.
Then there is the honorable mention: Toastie. It is the Duo version of the same ridiculous idea as the early iPhone beer-drinking app, and TechCrunch is clear it is not a killer app. Described as the world’s most expensive toaster, it lets you follow a recipe for toast with butter, cheese, or other toppings, then close the Duo to let the toast cook. Open too soon and your toast is undercooked, losing you the 5-star review. It costs $2.99 in USD. No EUR price was stated in the source, so none is given here.
The Honest Catch
The iPhone Duo potential is real but narrow today. These apps are the exception, not the rule, and TechCrunch is upfront that many mainstream iOS apps had not been made ready for the Duo at launch. The phone’s best screen can still show unadapted apps with black bars and odd controls. The useful proof is narrower: when developers design for two screens and four poses, the result feels genuinely different, not just bigger.
There is also the price of entry. TechCrunch puts the Duo’s starting price at $2,000, which is why the Toastie joke lands: a $2.99 toaster game on a $2,000 phone. The value case depends on whether these Duo-only experiences matter to you, and whether your own must-have apps follow the same path. TechCrunch expects more interesting apps as developers get their hands on the Duo in the weeks ahead.
Quick Answers
Which apps best show the iPhone Duo potential? Netflix for everyday watching, Deck-Man and Tiny Computers for retro ideas only a hinged phone can pull off, and Wakeout and Flighty for apps that adapt to every pose.
Did PetaTech24 test these apps? No. TechCrunch tested them on an Apple review unit, and this article reports those findings.
Do all iPhone apps work well on the Duo? No. Many mainstream apps were not optimized at launch, and unadapted apps can show black bars or oddly placed controls.
How much do the paid apps cost? Tiny Computers costs $3.99 as a one-time fee and Toastie costs $2.99, both in USD. No prices were stated for the other apps, and no EUR prices at all.
The Takeaway
The iPhone Duo potential is not about a bigger screen. It is about apps that think in poses and pairs of screens: a video app that browses small and watches big, a cassette player that becomes a Walkman when folded, a flight tracker that turns a tray table into a departure board. That gives early buyers reasons to unfold the phone.
The honest version is that this is a promising start built on a small set of apps, tested by TechCrunch rather than by us. If developers follow these examples, the iPhone Duo potential grows with every new release. If they do not, the Duo stays a great phone with a few clever tricks.
Sources
- TechCrunch, These clever apps show off the iPhone Duo’s potential, October 24, 2026. All app descriptions, poses, and prices in this article come from this report unless stated otherwise.
- Apple, iPhone Duo launch partner and Duo-optimized app announcements, as referenced by TechCrunch.
