SidePane
FeaturedUnfold a second screen for your Mac, with touch and Apple Pencil.
NewNow curating apps for iPhone DuoThe directory for
The directory for
iPhone Duo apps.
Hand-picked apps that make the most of both screens.
Featured apps
Partner spot · Available
Put your app in front of iPhone Duo users.
A safecracking game where opening the phone works the dial.
14 tiny games where the fold is the controller, with 260 handmade levels.
A wind-up music box where the hinge is the lid: open wider to play louder.
Fold it like a laptop and the bottom half becomes a keyboard or touchpad for your VM.
A marble maze across both halves, where folding turns floors into ramps.
Old computers where tabletop mode turns the phone into the computer itself.
Mini golf where half folding the phone tips the course.
Reshapes itself for every pose. Unfold it for a sidebar with all your lists.
Face-to-face translation: each person reads their own half, turned toward them.
A racing game with the race on top and a full controller below.
Half fold it into a typewriter: the page on top, the keys below.
Shut the phone and the cover screen becomes the inside of your front door.
Draw on the inner screen while everyone guesses from the outer one.
Two-player air hockey with the center line right on the crease.
A pocket handheld console that rearranges itself as you fold the phone.
Frame the shot inside while the cover screen gets your child to look at the camera.
Eleven tactile fidget toys where the hinge is the toy.
A keyboard that splits in two on the open screen, one half under each thumb.
A waist-level film camera: half fold it and look down into the glass.
One step at a time when closed. Open it for the finished model beside its steps.
Piano rhythm game: fold it like a laptop and the tiles glide toward your fingers.
An RSS reader with the list and article as a two-page spread.
A pocket arcade golf cabinet with a trackball on the bottom half.
Your book’s cover on the outside; unfold and the hinge becomes the spine.
Half-fold it into a typewriter: paper above the fold, keys below.
Make someone a mixtape, with your Duo as the cassette case.
A pixel pet that wakes on the cover screen and naps in the inner room.
Web video on the top half, playback controls on the bottom half.
Answers stay sealed while it’s shut; open the Duo for the big reveal.
Quick minigames, some played by folding to an angle or snapping it shut.
Backgammon with the board on one side of the fold and coaching on the other.
Markdown files as an open book, with two pages meeting at the hinge.
An ad-free e-ink-style reader: two pages open, one page on the cover screen.
An EPUB reader that opens as two facing pages across the fold.
Pop-up books of world cities that rise up as you open the phone.
The naval duel with private boards: stand it at 90° to shield your fleet.
Draw a fish below and watch it swim in the tank above.
A silly monster whose jaws follow the hinge and chomp when you snap it shut.
Fold the paper by folding your phone.
Turn the outer screen into a showcase for the people across from you.
The phone’s hinge becomes a door, a chest lid or a spellbook cover.
Stand it up like a laptop and the fold becomes a monster’s jaw.
A living aquarium for your desk that switches to desk view when half folded.
Butterfly painting where you really fold the phone shut to press the paint.
Stream your Mac. Half open, it’s a laptop: picture on top, trackpad and keys below.
Close the phone halfway and open it to crack a fortune cookie.
Give opening and closing your iPhone Duo a sound of its own.
A workspace for every pose, with a keyboard and trackpad in tabletop mode.
A little fridge in your phone: close it to shut the door, open it to look inside.
A flip phone that rings with wrong numbers: open the hinge to answer.
A record player for your music: close the lid to drop the tonearm.
A movie diary where each film becomes a ticket that stands up in laptop pose.
Close the phone with a question in mind, then unfold it to reveal an answer.
Open your phone and your schedule unfolds with it.
Plant-based recipes with a hands-free cooking mode when half open on the counter.
A 3D copy of your real fridge that suggests dinner from what you have.
Connect four for two: fold it, take a side, and play across the hinge.
A cookbook with ingredients on the left page and the current step on the right.
A cozy ramen cooking game: close your Duo to close up shop.
A number puzzle where bending the phone merges tiles at the spine.
Two quick games: guess an angle by folding, then see how far off you were.
An ant-colony simulation that fills the top half in tabletop mode.
A busy sign for your desk: fold it into a tent and it faces the room.
Daily Sudoku with the board on one half and the keypad on the other.
The classroom paper-soldier duel: fold to press your ink onto the rival’s page.
An accordion where the hinge is the bellows.
Fold the phone shut to bake fish-shaped Korean street pastries.
Relaxing jigsaws with the board and piece tray on separate halves.
Sketch on the cover screen, then open up for a bigger canvas.
A round little bird that flaps its wings every time you fold the phone.
A horror game where unfolding the phone opens a door, degree by degree.
A desk clock: fold it into a tent for a slow, living colony scene.
Chess in person, with a split clock that faces each player.
Team party games where the outer screen shows prompts to the other side.
A day planner that adapts as you fold, with a Focus Timer for book and tabletop.
Two-player games face to face, with 11 exclusives that use the fold.
Objects lie across the fold: bend the phone and they creak, crack and snap.
Show an outrageous book cover on the outside while you read on the inside.
Party games for every pose: closed, tent, laptop or flat.
A fishing game where the hinge is your fishing rod.
Hold it like a book: your photo deck on one page, totals on the other.
An emulator for 1980s pocket LCD games, laid out like the original units.
Origami puzzles where closing the hinge folds the paper.
Close the lid to bake: the cover screen shows the waffle as it cooks.
An angle-guessing game: open the phone to where you think the angle is.
A Japanese parlour game played to the beat, with your opponent on the upper screen.
Fold the phone to pump higher, like a playground swing.
The classic card game, with the hand you draw from standing on the upper half.
A paper maze you solve by folding the phone: pages bridge holes and pin enemies.
A retro music player that stands up on the top half when half folded.
Hide your soldiers, then stand the phone up as a tent so each player sees one half.
Folding puzzles where colors and lines mix when the halves meet.
A tongue-in-cheek workout that counts hinge reps as you open and close.
Open the phone to open the oyster, and stop at the perfect glint.
A boardwalk arcade where the fold sets the ramp of your throw.
The calendar and task app, now with iPhone Duo support.
The pub dice game Shut the Box, with the cover screen as the lid.
An arcade game where you trap and smash bugs with the real hinge.
An adaptive design workspace for the inner and outer displays and tabletop use.
Build a grilled cheese, then fold the phone shut to close the toaster.
Classic pass-and-play board games where the raised half covers your board.
Bend your phone to tip your Haven. Close it and a new friend hops onto the cover.
A pocket letterpress: ink the plate, close the phone, open it to see the print.
Draw on one half, close the phone, and open it to a mirrored imprint.
The Bible as a two-page spread that adapts to book, flat and tabletop poses.
A breathing timer: open the fold to inhale, close it to exhale.
Sleep sounds with Now Playing on the upright half and the mixer below.
The podcast player, with layouts improved for iPhone Duo.
A marbled scrapbook journal with its cover on the outer screen.
Japanese folding-screen art shown the way it was meant to be: folded and standing.
Notes, docs and tasks, now with iPhone Duo support.
Turn iPhone Duo into a pocket watch with an engraved lid on the cover.
Every time you fold your iPhone Duo, your origami takes one more fold.
Capture text first, decide what to do with it later. Ready for iPhone Duo.
A compact mirror: one plain half and one that magnifies 2.5×.
Astrology and tarot where folding shuffles the deck and flips your cup.
A privacy-first browser with layouts for both the inner and outer displays.
A pencil journal that opens like a book, with your day on the facing page.
A nightstand lamp where the hinge is the dimmer.
Simple, private step counting, now supporting iPhone Duo.
A cabin window onto an alpine lake that swings open as you unfold the phone.
A concertina and accordion where the fold of the phone is the bellows.
Shruti box and harmonium you play by opening and closing the phone.
Play your music as cassettes, with the shelf and tape deck on either side of the fold.
A pocket groovebox that becomes a little instrument when half folded.
A ribbon synth with the bars on the flat half and settings standing up.
A five-disc CD changer for your Apple Music library.
Turn your own songs into virtual tapes, with a companion view when unfolded.
An offline hi-fi player that goes full screen when the Duo stands half folded.
An instant camera that opens into a bigger workspace with film controls.
A camera for chromatic-aberration looks, with layouts for every pose.
Record front and back cameras at once in split screen or picture in picture.
Spatial photos and video from the Duo’s side-by-side rear cameras.
Play a video on the outer screen while you shoot on the inner one.
A retro photo booth that runs hands-free with a countdown on the outer screen.
A retro camcorder where the fold is the power switch.
A medium-format camera with the viewfinder below and controls facing you.
A teleprompter that runs your script on the outer screen, right by the camera.
A camera with looks your subject sees live on the outer display.
A digital photo frame that shows two photos, or a photo and a clock, standing up.
Turn photos into pop-up cards where the hinge opens the card.
A pose coach: your shot on one half and the AI coach on the other.
A warm, grainy point-and-shoot that your subject can preview on the outer screen.
A typewriter with the page on top and a full keyboard on the bottom half.
An odometer for your hinge, counting every fold on metal-framed drums.
Your calendar and reminders on a retro console that spans both screens.
A focus timer you start by closing the phone, building a city as you work.
A pocket notebook with its cover outside and a two-page spread inside.
A fan-made Pokémon field guide styled as a twin-screen scanner.
Padel and tennis scoring with a tabletop scoreboard mode.
Measure angles with the hinge: open it against a corner and read the angle.
A folding rule: the hinge angle in big digits, plus a ruler on both screens.
A one-minute hinge checkup that scores your foldable from 0 to 100.
Makes Safari fit the outer display, with its buttons in a side column.
A retro web computer: a real webpage above a playful keyboard and trackpad.
A clock and calendar that shows two months when open.
A game timer for two where the clock follows the fold.
No apps match your search yet.
What is iPhone Duo?
iPhone Duo is Apple’s foldable iPhone. It has a cover display on the outside and a larger inner display that opens like a book, and it can be used closed, fully open, or half folded in book and tabletop positions.
Which apps support iPhone Duo?
This directory lists 158 apps with confirmed iPhone Duo support, including Hinge Heist, Hinge Arcade, Lullaby Music Box, UTM SE, Marbles Unhinged, Tiny Computers, Hole in Fold and Things 3. Use the search and categories above to browse them all.
What does “built for iPhone Duo” mean?
It means the app changes its layout for iPhone Duo instead of simply stretching. For example, it might use each half of the inner display for something different, switch to a laptop-style layout when half folded, or keep going on the cover display when closed.
How are apps chosen for the directory?
Every app is reviewed by hand. Apps from other developers are listed only when their App Store release notes or description confirm iPhone Duo support, and each App Store link, developer, category and price is checked against the App Store.
How do I get my app listed?
Use “Submit app” to send the App Store link and a short note on what your app does on iPhone Duo. Every submission is reviewed by hand. Developers can also book the partner spot on the home page.
Is Built for Duo affiliated with Apple?
No. Built for Duo is an independent directory run by Vincent Chan. iPhone is a trademark of Apple Inc.