Book mode apps for iPhone Duo

Clips on the outer screen, cinema on the inner one, redesigned for iPhone Duo.

Launch partner: Named by Apple as an iPhone Duo launch partner.

GIF shelves across both halves, a GIF above its tags when folded, a showcase as a tent

Developer claimed: Florent Morin, who makes heypster as a side project, in a reply on X to a call for day-one iPhone Duo apps, with a video of heypster on the Duo (@florentmorin on X). The App Store page does not mention the Duo yet.

Immersive 180° and 360° video, with the controls below when folded like a laptop

Developer claimed: Florent Morin, the developer, in a post on X with a video of MVPlayer on the iPhone Duo, saying it will be available on the Duo on day one (@florentmorin on X). The App Store page does not mention the Duo yet.

Game emulator whose library reflows for the cover, open flat, standing and half-folded.

Developer claimed: Riley Testut, on Mastodon (mastodon.social), showing Delta's library in the iPhone Duo simulator. The App Store seller is Yvette Testut (Testut Tech).

Episode cards that split at the Duo crease

Developer claimed: Gowtham Oleti (@gow88_) posted Brink on the Duo simulator closed, open and half-folded (@gow88_ on X).

Ambient noise that splits at the Duo crease

Developer claimed: Charlie Chapman (@_chuckyc) showed Dark Noise on the Duo simulator closed, open and half-folded, after a few small tweaks (@_chuckyc on X).

Goal rings on the cover, chart beside them open

Developer claimed: David Steppenbeck (@dsteppenbeck) posted GridKit on the Duo simulator closed, half-folded and open (@dsteppenbeck on X).

A grid of habit cards on the cover; open, a sidebar of collections beside it

Developer claimed: Adam Kovacs, the developer (Adam KP on X), in a post with a video of Habitsy in the iPhone Duo simulator (@AdamKPx on X). The App Store page does not mention the Duo yet.

Podcast cover art up, playback below when half-folded

Developer claimed: Federico (@MicropodAudio) posted Micropod on cover, half-folded and open Duo poses (@MicropodAudio on X).

The countdown to the next prayer beside the day's times, on the cover and open

Developer claimed: The developer (@snowmoon_ on X) posted Miqat on the Duo's cover, open and half-folded, and said it is nearly ready for iPhone Duo (@snowmoon_ on X). The App Store page does not mention the Duo yet.

Vlog preview and moments that split at the Duo fold

Developer claimed: oblivious (@oblivious_film) posted its Duo layouts for each pose, due in version 2.2.0 (@oblivious_film on X).

Workout replays with the map beside the stats, and laptop-style controls when half-folded

Developer claimed: Shaun, the developer, on the app's iPhone Duo page with screenshots of every pose, saying Duo support will be ready on day one (getpersonalbest.com), linked from a post on X. The App Store page does not mention the Duo yet.

Old PC-98 MIDI songs, controls on the cover, split half-folded, all 32 parts open flat

Developer claimed: The developer, @FoamyDreamIR on X, says the Duo update passed App Review and posted a video of the Duo layouts (@FoamyDreamIR on X). The App Store release notes for version 1.4.0 (October 7, 2026) say it now supports the iPhone Duo.

Repaint a 3D room on the cover, half-folded or open

Developer claimed: RoomGenie (@RoomGenieApp) posted the 3D room on the Duo simulator half-folded, closed and open (@RoomGenieApp on X).

Strength workouts that log your set closed, open flat or half-folded on a gym bench

Developer claimed: Claire McGregor, co-founder of Tiny Ideas, in a post on X with a video of StrongEra on the iPhone Duo, saying it is Duo-ready (@clairesayshi on X). The App Store page does not mention the Duo yet.

Show list beside episode detail across the crease

Developer claimed: Maximilian Litteral (@maxhasadhd) posted Television Time on the Duo simulator open, half-folded and closed (@maxhasadhd on X).

Farm plots that span the Duo crease

Developer claimed: Simon Grimm (@schlimmson) posted Tiny Harvest (shown as Golden Grove) folding across Duo poses in the simulator (@schlimmson on X).

Markdown drafts on the cover, open and half-folded

Developer claimed: Zhao Xin (@owenzhao) posted a video of Writer for Markdown on the Duo simulator, closed, open and half-folded (@owenzhao on X). The App Store seller is listed as 鑫 肇 and the listing does not mention the Duo yet.

Sales charts on the cover, a sidebar of sections half-folded, a full chart open flat

Developer claimed: Jay, the developer (SlowBrewed Labs; the App Store seller is Seou B Hounkanrin), in a reply on X to Linda Dong saying Appstead is ready for the iPhone Duo, with four renders of it closed, half-folded and open (@SlowbrewedS on X). The App Store description also mentions the Duo.

The day's briefing on one half and the AI chat on the other, open or half-folded

Developer claimed: Tanmay Sonawane, the developer, in a post on X with a video of Halo closed, half-folded and open on the iPhone Duo, saying it will be submitted that day (@tanmays on X). The App Store page does not mention the Duo yet.

Timed notes for your partner, with a layout closed, half-folded and open

Developer claimed: Radomir Drndarski, the developer, in a reply on X to Federico Viticci's call for iPhone Duo apps, with a video of Pipnote closed, half-folded and open on the iPhone Duo, saying it is ready (@radomir_3 on X). The App Store page does not mention the Duo yet.

Park badges on the cover, a wider shelf half-folded, a map of your visits open flat

Developer claimed: Larry Chen, the developer (the App Store seller is Larry Le Chen), in a reply on X to Andru Edwards with screenshots of Scratchbook closed, half-folded and open on the iPhone Duo, saying the Duo optimization was just submitted for review (@larrychen on X). The App Store page does not mention the Duo yet.

Warsaw's buses and trams live on the map, closed, open or half-folded

Developer claimed: The developer, Piotr Jeremicz, posted a Duo simulator video of Zaraz Jadę and said it took only a handful of tweaks (@PiotrekJeremicz on X). The App Store page doesn't mention the Duo yet.

Jazz explorer, an artist and player on one side and their recording sessions on the other

Developer claimed: Dynamic App Design, the developer, in a Reddit post with a recording of Sessionography on the iPhone Duo simulator, calling it not final (reddit.com). The App Store page does not mention the Duo.

IPTV player with the picture above the fold and the channel guide below

Developer claimed: The developer, posting as u/weyoun3000 on Reddit with a simulator video of the iPhone Duo version (reddit.com). The post links this App Store page. Not yet stated as released.

Dog walk tracker that puts the route above and the controls below when half-folded

Developer claimed: The developer, Akshat Saladi, in a LinkedIn post with a simulator video of Zoomie's iPhone Duo layouts (linkedin.com). The App Store notes for version 1.0.5 say the app is getting ready for iPhone Duo. Not yet stated as released.

Art practice timer that puts the reference photo above the fold and the timer below.

Developer claimed: Jeremie Berduck, in a Mastodon post (iosdev.space).

Basketball playbook that gives the court and its tools more room when open.

Developer claimed: Jordan Morgan (@JordanMorgan10), in a post on X. That post links Jordan's write-up of adapting Elite Hoops. The studio's site, daywellspent.io, lists this app, and the App Store seller is Day Well Spent LLC.

News digest that becomes a desk display: the photo above the fold, the story below.

Developer claimed: Patrick Ostertag of OK-ia, in Mastodon posts (techhub.social and techhub.social). The App Store seller is Patrick Ostertag.

Contact dates app with a new stats pane made to fill the open Duo's wide screen.

Developer claimed: Ziga Dolar, in a Mastodon post (mastodon.online).

Theme park wait times that float over a full park map when the Duo opens.

Developer claimed: Matteo Dall'Ombra, in Mastodon posts (mastodon.social and mastodon.social).

Dungeon card game laid out for the cover, the open screen and a half fold.

Developer claimed: David Freeman, in a Mastodon post (mas.to).

Day planner that gives the current activity's tasks their own half when folded.

Developer claimed: Gabriel Guarino, on the SuperPlanner press kit (superplanner.app), with screenshots and a showcase video from the iPhone Duo simulator.

Local posts on a map, with cards and map rearranged for each way the Duo is held.

Developer claimed: The Topo account on Bluesky, in its Japanese "iPhone Duoへの道" (road to iPhone Duo) series (bsky.app). The App Store seller is TOPOS TECH LLC.

Bible reader in vertical text that opens into a right-bound book spread.

Developer claimed: Jihoon Suh, on the Vertically Verse iPhone Duo page (vertically.works), with captures from the Xcode 27.1 simulator. The App Store seller is Jihoon Suh.

Recipes on the cover, photo beside the steps when half-folded

Developer claimed: Kaz Motoyama (@kudakurage / Spinners) showed COOKY on the Duo simulator closed and half-folded (@kudakurage on X).

Poker session photo above the crease, stats below

Developer claimed: Left Pocket LLC posted half-folded and cover layouts of Left Pocket (@leftpocketapp on X), and its App Store description has a Duo support section.

Memories and people in two columns of cards that move apart when you half-fold it

Developer claimed: Gero Gerber, the developer, in a post on X with screenshots of Meetory open flat and half-folded on the iPhone Duo, asking whether the layout is the right call (@gerogerber on X). The App Store page does not mention the Duo yet.

Half-fold it and the spending chart and transaction list scroll apart

Developer claimed: Tanmay Sonawane, the developer, in a post on X with a video of Finma's transactions screen open and half-folded on the iPhone Duo (@tanmays on X). The App Store page does not mention the Duo yet.

Keeps goals and meals clear of the hinge when folded, and docks sheets beside it

Developer claimed: Stuart Hall, in a post on X with a video of Proto on the iPhone Duo, saying it will support the Duo from day one (@stuartkhall on X). The App Store page does not mention the Duo yet.

A sun dial whose tiles step off the crease as you fold

Developer claimed: The developer, Engin Kurutepe, posted a video of SolarWatch's layout going from open flat to half-folded (@ekurutepe on X) and later a TestFlight build with iPhone Duo support (@ekurutepe on X).

Remote control for your Mac, folded like a laptop with the trackpad and keys below

Developer claimed: Alex Manzer, the developer, in posts on X with a video of Telkino's laptop mode on the iPhone Duo, saying it is ready for the Duo (@AlexManzer on X). Another of the developer's posts calls it the laptop mode being added. The App Store page and release notes do not mention the Duo yet.

Daily word game whose grid and score rearrange for every fold and turn

Developer claimed: The developer, Chad Etzel, in an X post with a simulator video of Letters' main game view updated for iPhone Duo's screens, rotations and poses (@jazzychad on X). Not yet stated as released.

Portland transit map whose sidebar floats over the map, then takes a half of the fold

Developer claimed: Mario Guzmán, the developer, in a Mastodon post with screenshots of PDX Transit on the iPhone Duo simulator, open flat and half-folded (mastodon.social). The App Store lists the seller as Mario Guzman. The App Store page does not mention the Duo.

Flight-sim companion whose layout reflows for every fold of the Duo.

Developer claimed: Heavy64 (@Heavy64Lab), in a post on X. That account's site, avionicsbuddy.com, names Sharif El Fatatry as the author and links this App Store page; Sharif is also the seller.

Network monitor that keeps the download and upload graphs in view in every pose.

Developer claimed: Sören Gade, in a Mastodon thread (mastodon.social) showing Bandwidth Monitor in the iPhone Duo simulator. The App Store seller is Soeren Gade.

Flashcards whose score buttons stay on the lower half when the phone sits folded.

Developer claimed: Juan Arzola, in Mastodon posts (sfba.social and sfba.social). The App Store seller is autorelease LLC.

Podcast app whose Now Playing controls shrink to keep the crease clear.

Developer claimed: Rafael Schmitt, in a Mastodon post in Portuguese (burnthis.town).

Pixel camera that keeps the viewfinder on one plane when the Duo folds.

Developer claimed: Chad Etzel (@jazzychad), in a post on X. The App Store seller is Charles Etzel and the bundle id is net.jazzychad.DitherCam; the X profile links to neocam.app.

Weather app that splits evenly at a half fold and moves controls off the crease.

Developer claimed: Chris Wu, in a Mastodon post (mastodon.social). The App Store seller is Christopher Wu.

Color by number with the palette sized to one half and a canvas you can slide or zoom.

Developer claimed: Mark Andrade, in "Updating my app to iPhone Duo multiple screen sizes" on markandrade.com (markandrade.com). The App Store seller is Mark Andrade.

PDF reader that lays a book's spread across the fold, binding on the hinge.

Developer claimed: Satoshi Kojima, the developer, on the shelff site (skoji.dev), with pictures from the iOS 27.1 beta simulator. Duo support comes in version 1.8, which Satoshi plans to release before the Duo goes on sale on October 23.

Sheet music reader with the score above the fold and a tuner below it.

Developer claimed: Danny Behar, the developer, in a Bluesky post with pictures of Tutti on the iPhone Duo (bsky.app). Danny says Tutti is coming to iPhone for the Duo's launch day; today the App Store version is for iPad only. The App Store seller is Starduck Studio, LLC, which Danny's profile links.

A math quiz on the lower half when the Duo is half-folded

Developer claimed: The @BellaandPan account posted a half-folded Duo shot with the forest scene above the crease and a math question with answer buttons below (@BellaandPan on X), and says all six Duo layouts are supported. The App Store seller is BKRXY LLC and the listing does not mention the Duo yet.

Apple Music stations, the artwork on one half of the fold and the track list on the other

Developer claimed: Rudrank Riyam, the developer, in Bluesky posts showing Presset on the iPhone Duo simulator and calling it a first attempt at designing for the Duo (bsky.app). The App Store page does not mention the Duo.

Calculator whose keys split along the fold, then all drop to the lower half like a laptop.

Developer claimed: James Thomson, in his "PCalc on iPhone Duo" Mastodon series (Day 5: mastodon.social). The App Store seller is TLA Systems Ltd.

Retro lane racer with an arcade mode: the road on the upper half, steering below.

Developer claimed: Dani Devesa Derksen-Staats, in a Mastodon post (iosdev.space). The App Store seller is Daniel Devesa Derksen-Staats.