Tracker
Duo support.
Which apps have a real two-screen layout on the iPhone Duo, what each label rests on, and when it was last checked.
Updated November 6, 2026
Latest changes. Every label that moved, newest first.
Flighty Unverified → Duo-nativeVersion 4.11.2 (21 October) added iPhone Duo support with a hands-free tent mode, its release notes say; Flighty hasn't shown the Duo layout.
Readwise Reader Unverified → Duo-nativeVersion 8.27 (27 October) brought what Readwise calls preliminary iPhone Duo support, its release notes say: a two-column reading view when open, with more to come.
Infuse Scaled up → Duo-nativeVersion 8.5.9 (26 October) added iPhone Duo support, its release notes say.
Things Unverified → Duo-nativeVersion 3.25 (21 October) made Things ready for the Duo, its release notes say: a sidebar of your lists when open and a layout for every pose, as Cultured Code's own capture of the open Duo shows.
Goodnotes Unverified → Duo-nativeVersion 7.1.34 (1 November) is optimised for the Duo, its release notes say: a two-level toolbar, a reading mode and layouts for folded, half-folded and open.
Fantastical Unverified → Duo-nativeVersion 4.2.4 (23 October) lists iPhone Duo support in its release notes; Flexibits says it takes an iPad-style layout when open, with room for two Fantastical windows side by side.
Duo-native. A two-screen layout, confirmed by Apple or the maker.
1PasswordVersion 8.12.44 (4 November) added iPhone Duo support, its release notes say; 1Password hasn't shown the Duo layout.Checked Checked 
Aether SynthVersion 1.22 (27 October) refined its iPhone Duo theme and layouts, its release notes say; its maker's site shows the sound and preset controls above the keyboard on the open Duo.Checked Checked 
AksharVersion 4.0.2 (20 October) added two-page layouts for iPhone Duo, its release notes say; its maker's site shows the notes list beside a Hindi note and its Latin-letter version on the open Duo.Checked Checked 
AlarmateVersion 3.5 (1 November) added a split layout for iPhone Duo, its release notes say; its maker's site shows the alarm timeline beside the week's calendar events on the open Duo.Checked Checked 
AlpenglowVersion 12.1.4 (25 October) optimized screens throughout the app for iPhone Duo, its release notes say; its maker's site shows Vantage Point with the map beside the view on the open Duo.Checked Checked 
Ango TasksVersion 1.1.26 (21 October) added iPhone Duo support, its release notes say; its maker's site shows lists and tasks side by side on the open Duo.Checked Checked 
AppsteadVersion 1.0.2 (29 September) is ready for the Duo, its release notes say; its maker's renders show the dashboard closed, a sidebar beside it half-folded and the charts open flat.Checked Checked 
ArcFlushIts maker's site shows the wide layout on the open Duo.Checked Checked 
aside · BerlinVersion 1.1 (4 October) added Duo layouts; its maker's simulator video shows a card over the map closed, the map above the cards open upright, and a card beside the map turned sideways.Checked Checked 
Ask Watch AIVersion 2.2 put Chat, Home, Notes, Settings, Compare and Live Conversation in two columns on the open screen, its release notes say; its maker's site shows its chats on the open Duo.Checked Checked 
AteIQIts App Store description says the open Duo puts your calendar and your day side by side; its maker's site shows Pip on the left and the meal composer with your usuals on the right.Checked Checked 
aud-ioIts maker's site shows a development preview of The Shelf on the open Duo in landscape.Checked Checked 
BellowsbyMade only for the Duo: version 1.0 (15 October) plays the hinge as the bellows, open and close it to squeeze out each note, as its maker's capture of the open display shows. He built it in Apple's Duo simulator before his own Duo arrived.Checked Checked 
BezelIts makers have shown the app in eight poses, the preview on one half and the tools on the other when it opens. On TestFlight for press; out with the Duo on 23 October.Checked Checked 
BlackJackalVersion 2.0 (13 October) added an iPhone Duo design, its release notes say; its maker's site shows the session scoreboard, coaching and previous hands on the open Duo held sideways.Checked Checked 
Blackmagic CameraVersion 3.5.3 (23 October) added iPhone Duo support, its release notes say; Blackmagic Design hasn't shown the Duo layout.Checked Checked 
BlankieVersion 2.1.0 (27 October) added iPhone Duo support, its release notes say; its maker's site shows Now Playing beside a sound's volume card on the open Duo.Checked Checked 
BoshVersion 2.0 (25 October) added iPhone Duo support, its release notes say; its maker's site shows the Boshed Side beside the daily list on the open Duo.Checked Checked 
BrainDrainVersion 2.5.0 (15 October) added iPhone Duo support, its release notes say; its maker's site shows the progress view on the open Duo.Checked Checked 
BullseyeVersion 2.5.2 (22 October) added full iPhone Duo support, its release notes say; its maker's site shows a campaign editor over the campaign list on the open Duo.Checked Checked 
CalendarsVersion 5.41 (23 October) added iPhone Duo support, Readdle's blog says; it shows a full Week view with a week picker and a task panel on the open Duo.Checked Checked 
CanvaVersion 4.234.0 (4 November) added iPhone Duo support, its release notes say, for designing on the inner screen and folding to preview at real phone size; Canva hasn't shown the Duo layout.Checked Checked 
CaptureVersion 3.4.2 (24 October) added iPhone Duo support, its release notes say; its maker's site shows the capture grid across the open Duo's inner screen.Checked Checked 
CardhopVersion 2.5.1 (20 October) added iPhone Duo support, its release notes say; its maker's site shows Cardhop on the open Duo.Checked Checked 
CD WallyVersion 3.5.1 (17 October) added iPhone Duo support, its release notes say; its maker's site shows the disc spinning on one side and the track list and controls on the other.Checked Checked 
CitymapperVersion 11.53.1 (29 October) added iPhone Duo support, its release notes say; Citymapper hasn't shown the Duo layout.Checked Checked 
ComicFlowIts maker's site shows the library, with a Continue Reading card above the cover grid, on the open Duo.Checked Checked 
Courtside CountdownVersion 1.1 (30 October) added iPhone Duo support, its release notes say; its maker's site shows the tip-off countdown on the left and the season calendar on the right on the open Duo.Checked Checked 
CraftVersion 3.7 (10 October) is ready for the Duo from day one, Craft's blog says; its video shows the sidebar beside All Docs and a document's attachments beside the document on the open Duo.Checked Checked 
CridgetAn earlier update optimized it for iPhone Duo, its release notes say; its maker's site shows the match list on the open Duo.Checked Checked 
CRM AlertsVersion 5.0.0 (23 October) added more room for dashboards and records on iPhone Duo, its release notes say; its maker's site shows a record's sections on the left and its overview on the right on the open Duo.Checked Checked 
DanausVersion 1.2 (13 October) added a two-pane design for iPhone Duo, its release notes say; its maker's site shows upcoming occasions beside a person's gift ideas on the open Duo.Checked Checked 
Dart Scoreboard ProVersion 5.1.4 (24 October) added iPhone Duo support, its release notes say; its maker's site shows the win screen on a Duo folded on its side.Checked Checked 
Day OneVersion 2026.22 (23 October) added iPhone Duo support, its release notes say; Bloom Built hasn't shown the Duo layout.Checked Checked 
Deck-ManMade for the fold: open the Duo to pick a tape and load it, close it and the cover screen is the Walkman, as its maker has shown in Apple's Duo simulator. On the App Store as Deck-Man, version 1.0.2 (24 October).Checked Checked 
Deep GreenVersion 2.1.2 (13 October) added iPhone Duo support, its release notes say; its maker's site shows the board open flat in landscape with the game controls in the vertical bar.Checked Checked 
DetailShown by Apple on stage when it unveiled the iPhone Duo.Checked Checked 
DexFoldVersion 1.1 (20 October) lit up the outer screen during scans on iPhone Duo, its release notes say; its maker's site shows the sprite screen on the left and the description and keypad on the right of the open Duo.Checked Checked 
DocumentsVersion 8.22.10 (22 October) added iPhone Duo support, Readdle's blog says; it shows My Files beside a PDF open for annotation on the open Duo.Checked Checked 
DoodahVersion 1.2.2 (27 October) fitted the welcome screen to a folded iPhone Duo, its release notes say; its maker's site shows a birthday card on a Duo half open like a book.Checked Checked 
Doodle DaveIts maker's site shows a colouring page with the drawing tools docked beside it on the open Duo.Checked Checked 
DropsVersion 1.1 (21 October) added an iPhone Duo layout, its release notes say; its maker's site shows caffeine and water charts beside the day's logged drinks on the open Duo.Checked Checked 
DuoBoxVersion 1.1.1 (29 October) improved playing while folding the iPhone Duo, its release notes say; its maker's site shows bass buttons and a treble keyboard either side of the bellows on the open Duo.Checked Checked 
Easy Home ControlVersion 1.1.2 (26 October) brought iPhone Duo screenshots to the App Store, its release notes say; its maker's site shows the thermostat controls on the open Duo in landscape.Checked Checked 
EfimeraIts maker's site shows a journal spread on the open Duo.Checked Checked 
EkkoesIts maker's site shows the sound map on the left and the selected recording's player on the right on the open Duo.Checked Checked 
Eline's TableVersion 7.2 (17 October) added iPhone Duo support in every position, its release notes say; its maker's site shows a recipe in two columns on the open Duo.Checked Checked 
ElytraVersion 2026.10.2 (21 October) added iPhone Duo support, its release notes say; its maker's site shows a feed's article list beside the open article on the open Duo.Checked Checked 
EventualVersion 1.6 (15 October) is designed for every pose and orientation of the Duo, its notes say; its maker's Duo screenshots show the week's timeline across the open display and the month beside a day.Checked Checked - FantasticalVersion 4.2.4 (23 October) lists iPhone Duo support in its release notes; Flexibits says it takes an iPad-style layout when open, with room for two Fantastical windows side by side.Checked Checked
FastmailVersion 4.18.0 (30 October) improved iPhone Duo support, its release notes say; Fastmail hasn't shown the Duo layout.Checked Checked 
FinmaVersion 2.5 (12 October) added iPhone Duo support, its release notes say; its maker's site shows the Finma summary on the open Duo.Checked Checked - FlightyVersion 4.11.2 (21 October) added iPhone Duo support with a hands-free tent mode, its release notes say; Flighty hasn't shown the Duo layout.Checked Checked
FlipboardVersion 4.3.74 (30 October) added iPhone Duo support, its release notes say; Flipboard's blog (23 October) shows a story spread across the open Duo.Checked Checked 
Fold ClockIts maker's site shows the time and date beside the sound list and sleep timer on the open Duo.Checked Checked 
FoldlingIts maker's site shows Kit's house on the open Duo.Checked Checked 
FoldWallMade only for the Duo: version 1.0 (29 September) previews both screens' framings on the cover screen and the wallpaper full size when open, as its App Store screenshots from the Duo simulator show.Checked Checked 
FossilVaultVersion 2.2.1 brought FossilVault to both iPhone Duo displays, the release notes for 2.2.2 (28 October) say; its maker's site shows the specimen collection as a wide photo gallery on the open Duo.Checked Checked 
FrameIts maker's site shows the exercise and its timer beside the breathing shape on the open Duo.Checked Checked 
GameCacheVersion 1.2.0 (26 October) made GameCache for iPhone Duo, its release notes say; its maker's site shows a wall of game covers across the open Duo with the Daily Guess bar below.Checked Checked 
Gameday CountdownIts description says the unfolded iPhone Duo shows the countdown on the left and Schedule and Calendar on the right; its maker's site shows a kickoff countdown beside the season calendar on the open Duo.Checked Checked 
GarageBandVersion 2.3.20 (22 October) added iPhone Duo support with a wide layout on the inner display, its release notes say; Apple hasn't shown the Duo layout.Checked Checked 
GoldenIts maker's site shows a visualisation around the album art beside the track's details and drum pattern on the open Duo.Checked Checked 
GoodLinksVersion 4.1 (14 October) is ready for the Duo, its notes say; its press kit shows the article beside its Notebook of highlights, and beside the reading list, on the open Duo.Checked Checked - GoodnotesVersion 7.1.34 (1 November) is optimised for the Duo, its release notes say: a two-level toolbar, a reading mode and layouts for folded, half-folded and open.Checked Checked
Google MapsVersion 26.44.4 (3 November) fills both displays, MacRumors and GSMArena report from the device; Google's release notes say only bug fixes and Google hasn't shown the Duo layout.Checked Checked 
GreensIts App Store description covers the open and laptop-folded Duo; its maker's site shows Greens on the open Duo.Checked Checked 
GridiumIts maker's site shows the collage on the left and the tools on the right of the open Duo.Checked Checked 
GridstormIts description says the half-folded iPhone Duo turns the lower half into a control deck with a live map; its maker's site shows the arena beside the campaign menu on the open Duo.Checked Checked 
HalideVersion 3.3.0 (26 October) added iPhone Duo support, its release notes and Lux's page say; Lux's image shows the last photo beside the live viewfinder on the open Duo.Checked Checked 
HaloIts maker's video from Apple's Duo simulator (6 October) shows the day's briefing beside the agent chat on the open Duo; he was submitting it that day, after the App Store version (1.0).Checked Checked 
HBO MaxVersion 22.0.0 (3 November) added iPhone Duo compatibility, its release notes say; WarnerMedia hasn't shown the Duo layout.Checked Checked 
HealthLumioVersion 1.1.2 (18 October) is fully compatible with iPhone Duo, its release notes say; its maker's site shows the Today view with rings on the left and the legend on the right of the open Duo.Checked Checked 
HingeworthyIt requires iPhone Duo, its description says; its maker's site shows the hinge angle and today's folds on the left and the week's chart on the right on the open Duo.Checked Checked 
HomeBatteriesVersion 4.1.2 (22 October) added iPhone Duo support with multiple columns when unfolded, its release notes say; its maker's site shows it on the open Duo.Checked Checked 
iA WriterVersion 8.1.2 (29 October) made iA Writer ready for iPhone Duo, its release notes say, after iA's blog post of 20 October; iA has only shown it partly folded.Checked Checked 
Infinite BacklogIts App Store description says it supports the iPhone Duo, including tabletop and two-player modes; its maker's site shows a status panel on the left and the belt and columns on the right on the open Duo.Checked Checked 
InfiniteUpIts maker's site shows the board across both pages of the open Duo.Checked Checked - InfuseVersion 8.5.9 (26 October) added iPhone Duo support, its release notes say.Checked Checked
InoreaderVersion 7.11 added its Duo layout, in the App Store now as 7.11.1 (14 October): feeds and folders beside the articles on the open Duo, upright or sideways, keeping your place as it folds, as its blog showed on 5 October.Checked Checked 
journeybotVersion 2.0.0 (3 November) added layouts that adapt to the iPhone Duo, its release notes say; its maker's site shows the route map over the itinerary and travel essentials on the open Duo.Checked Checked 
KalsthenoVersion 1.1 (3 November) improved its iPhone Duo layout, its release notes say; its maker's site shows an exercise illustration on the left and its form cues and timer on the right on the open Duo.Checked Checked 
KeepDatesVersion 26.15 (26 October) added two columns on iPhone Duo, its release notes say; its maker's site shows the at-a-glance overview in the Duo sidebar.Checked Checked 
KinReadyIts maker's site shows the emergency card and next appointment beside documents that need attention on the open Duo.Checked Checked 
KiviqVersion 1.1.7 (21 October) added iPhone Duo support, its release notes say; its maker's site shows a habit's streaks, month calendar and insights across the open Duo.Checked Checked 
LedgewardVersion 1.3 (24 October) added portrait and landscape climbing on iPhone Duo, closed or open, its release notes say; the maker's Duo press kit shows the open layout.Checked Checked 
LexatetrahedraVersion 1.05 (3 November) made Lexatetrahedra ready for iPhone Duo, its release notes say; Adducive hasn't shown the Duo layout.Checked Checked 
LexibloxVersion 1.07 (3 November) made Lexiblox ready for iPhone Duo, its release notes say; Adducive hasn't shown the Duo layout.Checked Checked 
Liftin'Version 54 (9 October) added the Duo; its maker's render shows the day's exercises beside the chosen lift's sets, and he says the poses and a vertical tab bar were tested in Apple's Duo simulator.Checked Checked 
Living EarthVersion 4.50.1 (13 October) spreads the Earth across the inner display of iPhone Duo, its release notes say; its maker's site shows six cities' time and weather beside the globe.Checked Checked 
LociSince version 1.3.34 its App Store description says it supports iPhone Duo with layouts for the inner and outer displays; Loci AI's simulator walkthrough shows the history beside the chat on the open Duo.Checked Checked 
LookUpIts maker has shown the word's picture on the left half and its meaning on the right, with the Word of the Day on the cover screen. The Duo update is not out yet.Checked Checked 
Lowe'sVersion 26.10.2 (20 October) added iPhone Duo support, its release notes say; Lowe's hasn't shown the Duo layout.Checked Checked 
LTKVersion 5.77.0 (26 October) optimised LTK for iPhone Duo, its release notes say; rewardStyle hasn't shown the Duo layout.Checked Checked 
LumaFusionVersion 5.6.1 (29 October) added iPhone Duo support, its release notes say; Luma Touch hasn't shown the Duo layout.Checked Checked 
MarqueeIts maker's site shows the now-playing screen on the open Duo, album art on the left and playback controls on the right.Checked Checked 
Mercury WeatherVersion 3.8 (8 October) unfolds Mercury: your locations beside the forecast when open, the iPhone layout when closed, and two Mercury windows side by side, as its makers' press images show.Checked Checked 
Microsoft ExcelVersion 2.115.2 (2 November) fills both displays with a vertical toolbar, MacRumors reports; Microsoft's release notes don't mention the Duo and Microsoft hasn't shown the layout.Checked Checked 
Microsoft OneNoteVersion 16.115.2 (2 November) fills both displays, MacRumors reports; Microsoft's release notes don't mention the Duo and Microsoft hasn't shown the layout.Checked Checked 
Microsoft PowerPointVersion 2.115.2 (2 November) fills both displays with a vertical toolbar, MacRumors reports; Microsoft's release notes don't mention the Duo and Microsoft hasn't shown the layout.Checked Checked 
Microsoft WordVersion 2.115.2 (2 November) fills both displays with a vertical toolbar, MacRumors reports; Microsoft's release notes don't mention the Duo and Microsoft hasn't shown the layout.Checked Checked 
MinutedVersion 2.2 (21 October) rebuilt it for the inside of iPhone Duo, its release notes say; its maker's site shows the roster beside a running meeting on the open Duo.Checked Checked 
MLBVersion 26.18.3 (21 October) added iPhone Duo support with a redesigned tab bar and scoreboards for each orientation, its release notes say; MLB hasn't shown the Duo layout.Checked Checked 
ModerationVersion 1.2.1 (24 October) moved the log button into a side rail on iPhone Duo, its release notes say; its maker's site shows today's two rings on the open Duo in landscape.Checked Checked 
MoneyCoachVersion 14.0 (26 October) added iPhone Duo support, its release notes say; its maker's site shows accounts and the transaction list side by side on the open Duo.Checked Checked 
MotoWeekVersion 1.3 (25 October) added iPhone Duo support, its release notes say; its maker's site shows the race weekend schedule with its reminders menu on the open Duo.Checked Checked 
Movie BuzzIts maker has shown the poster on the left half and the film's details on the right, with a film list on the cover screen. The Duo update is not out yet.Checked Checked 
NachrichtenKlarIts App Store description says it opens like a newspaper on the iPhone Duo; its maker's site shows the lead story on the left and the day's other headlines on the right on the open Duo.Checked Checked 
NetflixShown by Apple on stage when it unveiled the iPhone Duo.Checked Checked 
Next ShotVersion 27.1 (22 October) added larger course previews and hole navigation in the vertical bar on iPhone Duo, its release notes say; Condor Digital hasn't shown the Duo layout.Checked Checked 
No Treat TodayVersion 2027.2 (8 October) added iPhone Duo layouts for every screen, its release notes say; its maker's site shows the Bedside Clock half open on the Duo.Checked Checked 
NotePlanVersion 3.22 (23 October) added iPhone Duo support, its changelog says; NotePlan's render shows a daily note beside the calendar and timeline on the open Duo.Checked Checked 
OmniFocusVersion 4.10 (22 October) added iPhone Duo support, its release notes say; Omni's blog shows the Forecast calendar beside the day's tasks on the open Duo.Checked Checked 
OmniOutlinerVersion 6.4 (21 October) added iPhone Duo support, its release notes say; Omni's blog shows the outline sidebar beside a focused section on the open Duo.Checked Checked 
One Word DiaryMade for the fold by Insania Labs: its own Duo simulator captures show the day's word on the left half and Reflections on the right. Version 1.0 is waiting for App Review.Checked Checked 
OrisujiIts maker's site shows the crane walking on the open Duo and carrying on across the cover screen once it folds.Checked Checked 
Our FatherIts App Store description says the Bible opens to two facing pages on the open iPhone Duo, and its maker's site shows John 1 across both halves.Checked Checked 
OvercastVersion 2026.10.1 (21 October) improved its layouts for iPhone Duo, its release notes say; Overcast hasn't shown the Duo layout.Checked Checked 
PackGoatVersion 2.3.0 (21 October) added iPhone Duo support, its release notes say; its maker's site shows the trip and its packing list side by side on the open Duo.Checked Checked 
PCalcJames Thomson has shown it in Apple's Duo simulator, the keys parting around the hinge and then the display above the keys in laptop pose. Not in the App Store version (3.14.4) yet.Checked Checked 
PDF ExpertVersion 7.26.3 (22 October) added iPhone Duo support with two PDFs side by side, its release notes say; Readdle's support page shows PDF Expert on the open Duo.Checked Checked 
PerchIts App Store description says the inner display puts sessions and a conversation side by side, and its maker's site shows exactly that on the open Duo.Checked Checked 
Personal BestIts maker's site shows a workout's route on a map beside its heart rate, distance, calories and a replay scrubber on the open Duo.Checked Checked 
PetwhileIts maker's site shows two camera feeds, the kitchen and the living room, on the open Duo.Checked Checked 
PhotocentIts maker, Insania Labs, has shown co-op on the open Duo in a Release build on the Duo simulator: the room and its players on the left half, your private idea and the round on the right, split at the hinge, with Solo's photo-beside-prompt layout split the same way. The names in the room are the app's built-in demo. Not in the App Store version (2.1.6) yet; it comes in an update.Checked Checked 
Pocket CastsVersion 8.23.2 (23 October) readied Pocket Casts for iPhone Duo with a multi-column Discover page, its release notes say; Automattic hasn't shown the Duo layout.Checked Checked 
PrayerList ProVersion 1.8.4 (2 November) refined its iPhone Duo layouts, its release notes say; its maker's site shows a Bible passage on the left and sermon notes in the journal on the right on the open Duo.Checked Checked 
Prompt22Version 1.1.0 (4 November) brought better Duo layouts, its release notes say; its maker's site shows the host list on the left and a terminal on the right on the open Duo.Checked Checked 
Push PushIts maker's site shows the drivers' standings on the left and the selected driver's profile on the right on the open Duo.Checked Checked 
QuenchedVersion 1.4.1 (24 October) fixed small bugs for its first iPhone Duo users, its release notes say; its maker's site shows the Today screen on the open Duo.Checked Checked 
RanaVersion 2.0 (18 October) added a dedicated iPhone Duo design, its release notes say; its maker's site shows the physiological sigh exercise on the open Duo.Checked Checked 
Reader UltraVersion 1.47 (23 October) brought it up to date for iPhone Duo, its release notes say; its maker's site shows the feed list on the open Duo.Checked Checked - Readwise ReaderVersion 8.27 (27 October) brought what Readwise calls preliminary iPhone Duo support, its release notes say: a two-column reading view when open, with more to come.Checked Checked
RepsVersion 2.0.0 (25 October) added iPhone Duo support, its release notes say; its maker's site shows the day's energy curve on the open Duo.Checked Checked 
RetrocadeVersion 1.15 (22 October) added support for the ways to play on iPhone Duo, its release notes say; Resolution Games hasn't shown the Duo layout.Checked Checked 
Rev RushVersion 1.3.0 (14 October) added iPhone Duo support, its release notes say; its maker's site shows the title screen filling the open Duo's inner display.Checked Checked 
Risky BusinessIts maker's blog (4 October) shows the register beside a risk's detail on the open Duo. Version 2.13 is finished but held back until the Duo goes on sale.Checked Checked 
Route 25Version 2026.10.1 (24 October) added iPhone Duo support, its release notes say; its maker's site shows the collection and an open binder on the open Duo.Checked Checked 
Scanner ProVersion 9.0.3 (23 October) added iPhone Duo support, its release notes say; Readdle's support page shows Scanner Pro's My Scans grid on the open Duo.Checked Checked 
Seed & BloomIts maker's site shows the garden board on the left and the seeds and tools on the right on the open Duo.Checked Checked 
shelffIts maker has shown a PDF spread across the hinge in book pose in Apple's Duo simulator. Version 1.8 is due before the Duo ships on 23 October.Checked Checked 
Shell DropVersion 5.2.2 (28 October) added iPhone Duo support, its maker's blog says; it shows a terminal edge to edge with session tabs on the open Duo.Checked Checked 
ShowcaseIts maker's site shows the Discover tab of version 1.5 on the open Duo.Checked Checked 
SignalVersion 8.35.1 (31 October) says Signal is optimised for iPhone Duo, though the first Duo version isn't known; Signal hasn't shown the Duo layout.Checked Checked 
SignDictIts maker's video (6 October) shows the sign cards on the left half and a sign's detail on the right when the Duo opens; the Duo version was being submitted to the App Store.Checked Checked 
SkipperIts description says the unfolded iPhone Duo shows your list and the show side by side; its maker's site shows the watchlist on the left and a show's details on the right on the open Duo.Checked Checked 
SlackApple's keynote showed its expanded two-screen workspace.Checked Checked 
SlopesVersion 2026.16 (10 October) is made for the Duo: a compact layout with a smaller map when closed and, open, the resort guide beside a full-size trail map, as its video shows.Checked Checked 
Smart TasksVersion 3.7.2 (23 October) added iPhone Duo support, closed or open, its release notes say; Francesco's press kit shows categories beside the Next 7 Days list on the open Duo.Checked Checked 
SmolpadIts two-column layout went out in version 1.3.5 (4 September); its maker has shown the note list beside the note on the open Duo in Apple's simulator, and the list alone on the cover screen.Checked Checked 
SnapshotsVersion 1.1.2 (3 November) extended its iPhone Duo support, its release notes say; its maker's site shows camera controls on the left and the viewfinder on the right on the open Duo.Checked Checked 
Sneaky SasquatchVersion 2.2.1 (23 October) added iPhone Duo support, its release notes say; RAC7 Games hasn't shown the Duo layout.Checked Checked 
SolardayVersion 1.4.1 (17 October) added iPhone Duo support, its release notes say; its maker's site shows Day and Do side by side on the open Duo.Checked Checked 
Solitaire 1380Its maker's Duo press kit shows the table beside the Quick Coach on the open iPhone Duo, and version 1.1.9 (28 October) names iPhone Duo in its release notes.Checked Checked 
SonosVersion 90.1 (Sonos 27.2, 15 October) added Duo layouts, its notes say; Sonos has shown the album art on the left half beside the player or the queue on the right.Checked Checked 
SparkVersion 3.20.1 (22 October) added iPhone Duo support, Readdle's blog says; it shows the inbox beside an open message and a drafted reply on the open Duo.Checked Checked 
StoriMade for the fold: its maker has shown the story on the left and the player on the right in Apple's Duo simulator, with the player moving to the cover screen when it closes.Checked Checked 
Story of UsVersion 1.4 (22 October) added iPhone Duo support, its release notes say; its maker's site shows the story and its illustrations beside the choices for what happens next on the open Duo.Checked Checked 
SymptoraIts maker's site shows the month's calendar beside the selected day's symptom entries on the open Duo.Checked Checked 
TabForgeIts maker's site shows the TabForge keyboard on the open Duo.Checked Checked 
Take01Version 1.1 (26 October) improved recording on iPhone Duo, its release notes say; its maker's site shows Take01 on the Duo.Checked Checked 
TasksVersion 5.2 (14 October) added layouts designed for iPhone Duo, its release notes say; its maker's site shows Tasks on the open Duo.Checked Checked 
TastebookIts maker, Insania Labs, has captured it on the open Duo in the iPhone Duo simulator (Xcode 27.1): who's eating on one half and the people and their needs on the other, the suggestions beside the chosen recipe, and tonight's plan in two columns, split at the hinge. The household in the captures is made-up demo data. Tastebook is in development and not on the App Store yet.Checked Checked 
Teleprompter ProVersion 3.90 (24 October) added the Duo: the script on the cover screen while you record with the main cameras, and open, the script beside the camera preview for whoever runs the prompter, as its makers' press kit shows.Checked Checked 
TeslaVersion 4.62.0 (21 October) added iPhone Duo support, MacRumors reported, with controls on the left and the car or home on the right; Tesla hasn't shown the Duo layout.Checked Checked 
TestFlightVersion 4.4.1 (22 October) added iPhone Duo support, its release notes say; Apple hasn't shown the Duo layout.Checked Checked 
The Weather ChannelVersion 16.30.3 (3 November) added iPhone Duo support with layouts that adapt to folding, unfolding and rotating, its release notes say; The Weather Channel hasn't shown the Duo layout.Checked Checked - ThingsVersion 3.25 (21 October) made Things ready for the Duo, its release notes say: a sidebar of your lists when open and a layout for every pose, as Cultured Code's own capture of the open Duo shows.Checked Checked
ThinkScribeIts maker's site shows the library beside a recording on the open Duo.Checked Checked 
ThreadbreakerVersion 1.1 introduced an adaptive arena and controls for the iPhone Duo, its release notes for 1.1.1 (25 October) say; its maker's site shows the wide arena with sticks on either side on the open Duo.Checked Checked 
TickTickVersion 8.2.41 (30 October) added iPhone Duo support, its release notes say; Appest hasn't shown the Duo layout.Checked Checked 
TimepageVersion 5.2.2 (25 October) added iPhone Duo support, its release notes say; its maker's site shows today beside the week on the open Duo.Checked Checked 
ToastieMade for the fold: the Duo mode arrived on launch day (23 October). The cover screen is the toaster's lid; open it to build the sandwich, fold it shut to grill and open it to check, as its makers' press kit shows.Checked Checked 
Today's BudgetIts maker's site shows today's budget beside recent activity, fixed costs and savings goals on the open Duo; version 3.3.2 (24 October) improved its iPhone Duo layout, its release notes say.Checked Checked 
TorpedoIts maker's site shows your fleet on the left page and the enemy waters on the right of the open Duo.Checked Checked 
TreadIts description lists workouts and shoes side by side on iPhone Duo; its maker's site shows workouts on the left and the shoe rotation on the right on the open Duo.Checked Checked 
TripsyTripsy says it is ready for the Duo (25 September) and has shown a trip's places beside their map on the open phone, in a render. Not in the App Store version (3.10.2) yet.Checked Checked 
True SkiesIts two-screen layout is built and arrives in version 2.0; the App Store version (1.2.17) predates it.Checked Checked 
TunereadIts maker's site shows the library beside the player and its highlighted article text on the open Duo.Checked Checked 
TV RemoteVersion 4.3.3 (21 October) added iPhone Duo support, with multiple remote pages when unfolded, its release notes say; its maker's site shows it on the open Duo.Checked Checked 
TypeDrawMade for the fold: version 1.0 (20 October) opens like a notebook, a swipe of the cover screen or unfolding the Duo, onto a two-page spread, as its maker's render shows.Checked Checked 
ValiseVersion 1.3 (24 October) added iPhone Duo support, its release notes say; its maker's site shows the trip map on the open Duo.Checked Checked 
VulpoVersion 1.4 (15 October) added iPhone Duo support, its release notes say; its maker's site shows its rooms on the open Duo.Checked Checked 
WakeoutIts maker's site shows the movement games and Play Now beside Home on the open Duo.Checked Checked 
Watch ChessIts maker's site shows one live game beside a grid of the round's other boards on the open Duo.Checked Checked 
WaypointsIts App Store description says the open iPhone Duo puts filters and places side by side, and its maker's site shows exactly that.Checked Checked 
WebexVersion 46.11.0 (22 October) added iPhone Duo support, its release notes say; Cisco hasn't shown the Duo layout.Checked Checked 
Well SaidIts maker's site shows the library, with quotes and Bible verses in two columns, on the open Duo in landscape.Checked Checked 
WidezillaIts App Store description says it is built for the iPhone Duo; its maker's site shows a full-width web page under its floating address bar on the open Duo.Checked Checked 
Y-PodIts maker's site shows Notebook Mode on the open Duo.Checked Checked 
Yes I DuoMade only for the Duo by Insania Labs: the cover screen is the closed lid, the hinge angle opens the box, and the open Studio sets the box beside the ring steps, as its Duo simulator captures show. Version 1.0 is waiting for App Review.Checked Checked 
ZoomShown by Apple on stage when it unveiled the iPhone Duo; version 7.2.5 (1 November) lists iPhone Duo support in its release notes.Checked Checked
Unverified. Nothing on the record yet.
CARROT WeatherVersion 6.9.2 (9 October) says it added iPhone Duo support, but Grailr has not shown or described a two-screen layout yet.Checked Checked 
DarkroomNo Duo statement from Bergen Co. yet.Checked Checked 
KindleNo Duo statement from Amazon yet.Checked Checked 
NotionNo Duo statement from Notion yet.Checked Checked 
ObsidianIts last update came before the Duo tools; nothing confirmed.Checked Checked 
Procreate PocketProcreate has said Duo support is coming once it has tested and optimised it.Checked Checked 
SpotifyNo Duo statement from Spotify yet.Checked Checked 
TodoistNo Duo statement from Doist yet.Checked Checked 
WhatsAppNot among the apps Apple named, and no statement from WhatsApp.Checked Checked 
Working CopyIts September update did not mention the Duo.Checked Checked 
YouTubeNot among the apps Apple named, and no statement from Google.Checked Checked
Labels follow what Apple and each maker have said on the record until the Duo is in people’s hands; then we try every app on it. How we pick.