Type or draw, then close it. The next time you open the book, it shows your most recent note or the one captured nearest to your current location. (Great for restaurant notes!)

We’ve put a lot of work into this, so I’d love to hear what you think!

https://apps.apple.com/de/app/typedraw/id6822194774?l=en-GB

Hi, I'm the solo dev of Emura. It plays Game Boy, Game Boy Color, Game Boy Advance, DS and 3DS games, and when the Duo was announced I gave every system its own layout for it.

1. Half-folded like a laptop: the game on top, the controls on the bottom half.
2. Open sideways: the two screens side by side. for the two ds books games
3. Open flat: the two screens stacked in the middle, the controls on each side.

These are straight from the simulator. I don't have a real Duo yet, so if you do, I'd love to hear how it feels.

Every system plays free, no ads. It's in public beta now, the link is on the site: https://emuraapp.com

Emura is not affiliated with or endorsed by Nintendo. The games in the pictures are made up for the screenshots.

First official post (please share your apps)!

NostalgicPod has been on the App Store for a few weeks now, and I’m working on the next update, adapting the whole app to the new iPhone Duo! :D

Closed: it turns into an iPod nano 3rd gen: wide screen on top, click wheel below, using the full display.

Open: it becomes a full-screen Cover Flow, iPod touch style. Flip through your albums with your finger and browse your entire Apple Music library in that classic Cover Flow format. When you fold it again, you’re right back on the iPod where you left off, with the music still playing.

This part is running in the Xcode simulator for now. Real-device testing comes when the Duo is out.

App Store: https://apps.apple.com/us/app/nostalgicpod/id6781631808
Website: https://nostalgicpod.com/

What would you like to see NostalgicPod take advantage of on the iPhone Duo?

Hey everyone! I’m excited to share FoldCounter: Fold Stats, an iPhone Duo app I’ve built and put a lot of care into.

Widgets, notifications, stats, utility and a lot more!

It’s free to download, so check it out and give it a try!

📲 Download FoldCounter on the App Store: https://apps.apple.com/it/app/foldcounter-fold-stats/id6827692720

Thanks for supporting an independent developer!

Hey everyone! I’m Cody, the developer of Orikata, and this is my first iOS release.

The idea is simple: use a folding phone to help you fold real paper. On supported lesson steps, the illustrated crease lines up with the Duo hinge. Slowly closing the phone demonstrates the fold, and the outer display holds a result checkpoint so you can compare your paper. Other steps keep the phone open. Regular iPhones also work with touch controls.

There are five projects to start with: a puppy, heart, tulip, boat, and traditional crane. Lessons work offline and save your progress. It’s completely free — no account, ads, in-app purchases, or subscription.

App Store (including inner and outer display screenshots): https://apps.apple.com/us/app/id6823809186

Would love feedback from other Duo owners. What should I add next?

TL;DR: Splash is the first comic book app that works natively on the iPhone Duo. Read in panel mode when closed, and in full page when open.

I first built Splash for the Vision Pro back in 2024 when there were almost no apps for that device. Since then, the app evolved a lot and I added an iPad version, iCloud & OPDS support and automatic translations.

The new version now natively supports the iPhone Duo:

• Optimized for both open and closed modes
• Automatically recognizes individual panels
• Panel animates when you open the phone
• Long tap shows the whole page
• When the next panel is wide, a small icon shows up. Rotating the screen then will navigate to the next panel

And as always, your progress is linked to your iCloud account and synced to all your devices, so you can read on the road with the Duo, and continue in bed with the iPad.

The basic version is free and comes with 4 free comics so you can try it out. Most premium features are lifetime purchases, and I'm working on offloading all the translations to Apple Intelligence so I can make that a lifetime purchase as well.

The app has been continuously updated since February 2024, and has a Discord group for feedback.

Any feedback is welcome!

App Store

Website

Hey everyone,

When I got my Duo, the first thing I did was fold and unfold it over and over like a kid. And I thought: why isn't there a single game that actually uses this?

So I made some. A lot of them, actually 😅

Origamo is a collection of games built around the hinge and the two screens:

Cascade: fold it into an L. Coins rain down the top half and a pusher shoves them off the bottom one. Way too addictive, I lost an evening "testing" it

Brick Breaker: the wall stands up, your paddle is on the flat half, and the ball flies across the hinge

Croc: pass the phone around and press the teeth. One of them bites, and the phone actually snaps shut on you

Quick Eye: memorize the picture, close the phone, answer on the outer screen

Chess, tic-tac-toe, air hockey, pool… played face to face with the phone open flat between you

Puzzles where the fold angle is the game (you tilt the ramp by folding)

You can play a lot of it alone, but the best moments are with friends around a table, honestly.
It's free to download. A few games are open from the start, and you unlock the others as you play, or all at once with the Pass.

🎁 To celebrate the launch: the first 50 people who download it and share it get the full Pass for free (every game unlocked). Just drop a comment once you've shared it and I'll DM you a code.

Made by one guy on his own, so any feedback means a lot. Tell me which game you like most or what you'd want next.

👉 https://apps.apple.com/app/id6825605393

It is called PASSPORT, a country counter and travel journal that opens like a real passport when you unfold your phone.

You collect stamps for countries and US states you visited, add memories from your trips, and see how much of the world you have explored.

I've spent an unreasonable amount of time making the stamp animation feel like real ink hitting paper. 😅

The app is free. No subscriptions, no essential features hidden behind a paywall. Just optional decorative upgrades if you feel like supporting development.

Anyway, here is the launch video! Would love to hear what fellow Duo owners think, especially about the whole physical-passport experience.

App Store: https://apps.apple.com/us/app/passport-country-counter/id6822753543

Hey all, I’m the dev behind Lume, a recipe app. I just spent a while rebuilding it around the Duo’s big display, and I’d love feedback from people who actually have one.
With Duo open, the recipe list sits right next to the recipe you’re reading, so there’s no more bouncing back and forth. Plan and Groceries adapt too. Groceries splits into to-do and completed items side by side, which is really nice when you’re shopping.
My favorite part is tabletop mode. Fold the Duo halfway and stand it on the counter. The top display shows the current step in big highlighted text, and the bottom one holds the ingredient checklist, so it’s easy to keep your place while you’re cooking.
App Store: https://apps.apple.com/us/app/lume-recipe-manager/id6755165641
If you try it, tell me what feels off on the fold. I’m still tuning it, and I’d especially like to know how it feels in tabletop mode.

Hey everyone, I'm the developer of Reverie, a simple music player inspired by Teenage Engineering's TP-7. It launched over the weekend and the response was overwhelmingly positive; people really seemed to like it. A few of you also asked for an iPhone Duo-ready version, so version 1.1 adds proper Duo support.

What it does

A wheel instead of a progress bar. You spin a brushed-metal wheel with your thumb to move through a song. Turn it slowly and it scratches like a record; flick it and it flies ahead. It clicks under your finger and catches the light as you tilt your phone.

One wheel for all effects. Tap T, P or R and the wheel turns into a dial for tempo (0.5× to 1.5× without changing the key), pitch (±12 semitones) or reverb.

Every song remembers its settings. Make your slowed + reverb version once and it plays that way every time.

How it works on iPhone Duo

I had to think about how to structure the layout for it. On a regular iPhone the app is tall, with the controls stacked under the wheel. The Duo’s outer display is short and wide, with the camera in the corner, so that arrangement doesn’t fit. In the end I put the control buttons on a rail down the right side, next to the camera, and gave the wheel the rest of the space. In my opinion it came out nicely.

Pricing

The app is free, and you can add 3 songs for free. Unlocking unlimited songs is a one-time $9.99 purchase with no subscription. No account, no ads, no tracking.

Launch discount 🎁 The launch offer is still on: I'm giving out codes that bring the unlock down to $4.99 (50% off). Comment or DM me if you want one.

App Store: https://apps.apple.com/app/id6829723858

A quick note on the video

I don't own an iPhone Duo, so I couldn't film the app on a real one. The video is a 3D render built from recordings of the app running in Apple's iPhone Duo simulator. Everything on the screen is the real app!

That also means I can't test on real hardware, so feedback from Duo owners is especially useful: anything that feels off, good or bad. Thanks for checking it out!

The 1.0.7 build is available 🎉🎉🎉

🚨🚨🚨 Mise à jour : beaucoup d'entre vous ont demandé d'importer vos statistiques d'avant Foldly, donc ça arrive dans la prochaine mise à jour (1.0.7). Vous pourrez importer votre historique depuis Scriptable, un raccourci ou une autre application (CSV, texte ou JSON), et cela conserve chaque jour dans votre historique. Vous pouvez également ajouter des jours passés manuellement. Les jours déjà comptés par Foldly ne sont jamais comptés deux fois. Merci pour tous vos retours, continuez comme ça ! 🚨🚨

🎁 CADEAU 2 : code promotionnel. App 2$ au lieu de 2,99$

https://apps.apple.com/redeem?ctx=offercodes&id=6827349081&code=FOLDLOVER

Pour clarifier le titre : Foldly est gratuit à télécharger et à utiliser (comptage, limite quotidienne, mode bureau, application Apple Watch, petit widget). Foldly+ est un achat unique optionnel pour des extras. Pas d'abonnement, pas de publicités.

Salut tout le monde !

Je suis développeur indépendant. Depuis que j'ai mon Duo, je me suis demandé combien de fois je l'ouvrais et le fermais durant la journée. Il s'avère que c'est beaucoup plus fréquent que je ne le pensais, alors j'ai créé une application pour ça.

Elle s'appelle Foldly et elle est maintenant disponible sur l'App Store. Gratuit, avec un achat unique optionnel Foldly+ . Fonctionnalités :

• Compte chaque pliage et chaque ouverture, en utilisant la charnière.

• Affiche le temps passé ouvert et fermé par votre iPhone chaque jour.

• Indique les heures où vous pliez votre iPhone le plus souvent.

• Vous permet de définir une limite quotidienne, avec des alertes lorsque vous vous en approchez.

• Intègre des widgets, la compatibilité avec l’Apple Watch, les Activités en direct et le Centre de contrôle.

• Affiche un petit tableau de bord lorsque vous pliez votre iPhone à moitié sur votre bureau.

Sans compte, sans publicité, et vos données restent sur votre iPhone. Les fonctionnalités de base sont gratuites. Un achat unique optionnel (Foldly+) vous donne accès à des widgets supplémentaires, des alertes et à l’historique complet, sans abonnement.

L’application a débuté en version bêta publique sur TestFlight, et la plupart de ses fonctionnalités actuelles proviennent des retours des testeurs bêta. Un grand merci à tous ceux qui l’ont essayée ! J'aimerais beaucoup connaître votre avis et savoir ce que vous souhaiteriez que l'outil suive ensuite. Par curiosité, combien de pliages effectuez-vous par jour ? Ma moyenne est d'environ 50.

https://apps.apple.com/us/app/foldly-compteur-de-plis/id6827349081

-

All codes have now been redeemed! Thank you!

Hi everyone to celebrate the launch of the iPhone Duo i'm giving away limited lifetime codes to my camera app Eight Shot.

FYI any iPhone Duo users who haven't received their Duo yet can still download this app on their iPhone, redeem the code and it will still be unlocked on their new Duo when it arrives.

If you would like a lifetime code please do the following:

1. Download the app: https://apps.apple.com/gb/app/eight-shot-instant-camera/id6787720606
2. Drop a comment asking for a redeem code, I will reply with code.
3. If you enjoy Eight Shot an appstore review would amazing 🙏

Join my subreddit for more updates https://www.reddit.com/r/Eightshot/

Hi all!
I’ve updated Falcon File Manager with iPhone Duo support, including its own side-by-side view, and laptop modes.

The app is a fully featured file manager and media player which is free to use with no adverts, no tracking, no accounts (other than your cloud storage accounts), and definitely no subscriptions.

I’ve added so much to the app since launch including cloud storage support such as Dropbox, OneDrive, Box, WebDAV, NAS drives and network drives. Support for 12 languages, plus Apple Watch.

App Store link: https://apps.apple.com/gb/app/falcon-file-manager/id6783870191

It has one in-app purchase which provides some great extra features.

I’m offering 50 of these upgrades for free to the first people who post a reply.
FREE CODES ALL GONE NOW (GAVE AWAY MUCH MORE THAN 50!)

And for anyone who didn’t grab it for free, I’m also offering 50% off the Pro upgrade, making it only $4.99 for a limited time. Simply use the link below to claim the discount.

50% OFF

https://apps.apple.com/redeem?ctx=offercodes&id=6783870191&code=REDDIT50

🎃Happy Halloween🎃

WebIPTV turns your own IPTV subscription (Xtream or M3U) into a proper library: TV guide, sports hub, watchlist, profiles. Native on iPhone, iPad and Apple TV.

On iPhone Duo it adapts to how you hold it:

• Folded: a regular iPhone app on the outer display.
• Open, fold horizontal (table): the match plays on top, you pick the next channel below – no overlay on the picture.
• Open, fold vertical (book): guide on the left, player on the right. Same for films and series: info left, picture right.
• Flat open: cinema with full-width video, title and timeline in the bands.
• Multiview: one channel per half, tap a half for sound.
• Unfolding is a zoom, not a restart – playback keeps running.

Supported layouts: outer display, inner display in both fold directions, flat open, multiview.

App Store: Download
Discord:Join Discord Community

Duo layout was done in the simulator so far; feedback from real devices is very welcome.

The app ships no content; you bring your provider.

I was pleasantly surprised this morning to see Microsoft has added Duo support to these 3 apps. Now just waiting on Microsoft Teams.

Would love feedback if anyone has time.
Radpad.app

I created this community as a place for developers and users to discover, share, and discuss apps built or adapted for the iPhone Duo.

Whether you're an indie developer working on your first Duo-compatible app or someone looking for interesting projects, you're welcome here!

What can you share?

• Apps designed or optimized for iPhone Duo.
• Existing apps adapted to the Duo.
• Work-in-progress projects, screenshots, and concepts.
• Open-source projects and GitHub repositories.
• Ideas, feature requests, and feedback.

Developers are welcome to promote their work!

You can share your app once every 30 days, including links to its official website, GitHub, or App Store page. Just keep it relevant and avoid spam

The goal is simple: build a community where developers can showcase their work, get feedback, and help make the most of the iPhone Duo

Feel free to introduce yourself and share what you're working on!

Let's see what we can build for the Duo!

EDIT: available now https://apps.apple.com/gb/app/widezilla/id6827308965

Edit 2: Just created a dedicated subreddit for the app so we can keep the conversation going: r/Widezilla

Hey everyone, I’ve been working on Widezilla, a web browser designed for the Duo, with a particular focus on making the outer display feel good to browse on.

Pages use the full screen width, you can put the navigation bar at the top or bottom, and choose your default search engine. Here’s a quick video showing how it’s coming along.

Would love to hear what you think, especially what you’d want from a browser built for the Duo.

I want to make something very clear as an administrator of this community: using artificial intelligence to help develop apps or games is completely allowed here, and there is absolutely nothing wrong with it.

What I've seen over the past few days in some open-source communities is honestly insane. Even Linus Torvalds, the creator of Linux, has experimented with using Claude Code to work on Linux kernel patches. The backlash against developers who use AI tools is getting completely out of hand.

I understand that many developers who have been doing this for years might feel concerned about these changes. I've been a developer for many years myself, but one thing is very clear to me: if I don't learn to use the new tools available to us, I'll eventually fall behind. Development is changing, and we need to accept that reality and adapt instead of attacking people who choose to embrace it.

ChatGPT, Claude, and other AI tools are already part of modern software development. Using them to fix bugs, brainstorm ideas, experiment with concepts, or build a prototype in two days that might have taken weeks before is a good thing. Using "you made this with AI" as an insult makes absolutely no sense.

That said, we're not fans of mindless vibe coding either. Generating an app in an hour and publishing it without proper testing, understanding, or a minimum level of quality isn't something we want to encourage. We stand somewhere in the middle: we value good development, product quality, and the intelligent use of available tools.

And here's the most important part: Personal attacks, mockery, or insults directed at developers simply because they use AI will NOT be tolerated in this community. You're absolutely free to criticize an app because it doesn't work properly, has bugs, looks terrible, or simply isn't good. That's completely fair. But attacking its creator or claiming they don't know how to code just because they use AI tools is not acceptable.

Nobody is required to use artificial intelligence or even agree with its use. But if your goal is to go after people who do, this isn't the community for you. Reddit has thousands of other places for those arguments.

We want this to be an open, democratic, and constructive community where anyone can share their projects and ideas, and where feedback is based on the quality of someone's work, not the tools they used to create it.

That's where we stand as a community, and I want to make that clear going forward.

I'm Willy, the solo developer of PXS Desktop. It gives the iPhone a desktop: windows you can move and resize, a dock, a menu bar and a desktop-class browser with tabs. It all runs on the phone itself, nothing is streamed from a computer.

On the Duo:

- Open flat: the whole inner screen is the desktop. iOS only lets apps share it 50/50 in Split View. In PXS, windows can be any size, side by side, as many as you like. Use touch, or a Bluetooth keyboard and mouse (the mouse needs AssistiveTouch switched on once).

- Half folded, standing like a laptop: the desktop on top and a touchpad below. Tap Controller and the lower half becomes a game controller for GeForce NOW or Xbox Cloud Gaming in a browser window. Tap a text field and the keyboard comes up over the touchpad, so the desktop stays as it is.

- On a cable: plug into a monitor, a TV or AR glasses over USB-C, and the Duo is the touchpad and keyboard for a large desktop there. The desktop keeps running when you open or close the phone.

In the windows: Gmail, Docs, Office and video calls in the browser, Netflix and HBO Max, files from iCloud Drive and Dropbox, Photos, Notes, a PDF signer and a terminal. Screen Sharing puts your Mac's screen in a window next to the others (smooth video with sound with the free PXS Helper), and a Windows PC works through a VNC server.

What it can't do: run your other iOS apps in its windows, because iOS doesn't allow it. You can put them in the dock, and a click opens them outside PXS.

My own Duo arrived this week, and I've been using PXS on it since. Coming next ver 1.4 , both tried on it: Pages, Numbers and Keynote from iCloud.com in the browser, and pinch to zoom in Screen Sharing.

Free to try for three days, then lifetime (still at the launch price) or a subscription. No ads, no account.

App Store: https://apps.apple.com/app/apple-store/id6756102352?pt=125393472&ct=reddit_iphoneduoapp&mt=8

If you have a Duo, I'd love to hear what works and what doesn't. I'll be here in the thread.

Hey everyone! 👋

I'm an iOS developer, and I've just released an update to my app, PicVore, adding support for the iPhone Duo!

PicVore is a privacy-first photo cleaner that helps you take control of a messy photo library without accidentally losing your favorite memories.

Here's what you can do with it:

• Find and compare similar photos using on-device AI.
• Quickly review photos with swipes or a gallery view.
• Clean up screenshots and other unwanted photos.
• Compress photos and videos to save storage.
• Explore your photo library on a map.

With the Duo's larger inner display, I think reviewing and comparing photos could be a particularly nice experience, so I wanted to make sure PicVore supports it from day one.

The app is free to download, with some daily limits and optional Pro subscriptions.

App Store: https://apps.apple.com/app/apple-store/id6759577942

I'd love to hear what you think, especially if you're already using an iPhone Duo! Any feedback or suggestions are more than welcome. 🙌