Reading and comics apps for iPhone Duo: which ones are ready? We checked 1,436

iPhone Duo opens into a 7.6-inch screen that folds down the middle like a paperback, so it looks made for reading. We set out to list the reading apps that are ready for it. On 9 October 2026, two weeks before Apple's on-sale date of 23 October, we could not find a single one with a written source. So this page shows what we checked, where the big apps stand, and the seven things to look for when the updates arrive.

This page reports what we found on 9 October. iPhone Duo went on sale on 23 October, so check each app's What's New for anything newer. A disclosure: we make Chonky Corgo, a walking game. It is not a reading app, so it is not in the lists here, and it appears once, in a screenshot of the book pose. We had not held an iPhone Duo when we checked. Every claim about an app comes from its App Store release notes or from Apple, and our screen sizes come from Apple's iPhone Duo simulator.

Which reading apps support iPhone Duo?

None that we could confirm on 9 October 2026. We read the newest US release notes of 1,436 apps: the top free, paid and grossing charts in Books, News, Magazines, Reference, Productivity and Education, plus reading apps we searched for by name. Six mentioned iPhone Duo or the word Duo. None of the six is a reading app.

The six were the podcast player Overcast, the project manager Kan Do, a wallpaper app, a roulette dealer training app, Duolingo, whose owl is called Duo, and the Duo Mobile sign-in app. Kan Do shows what a real update looks like: its notes say that held open like a book, its board puts one column on each page with the crease between them. We hope reading apps describe their updates that clearly.

Do Apple Books and Apple News work on iPhone Duo?

They run, but Apple has not said how they use the fold. Apple's iPhone Duo page, announcement and design guidelines describe Mail, Notes, Photos, Safari and FaceTime. Apple Books and Apple News+ appear only as links in the page's menus and footer. Nothing we found from Apple by 9 October shows either app on iPhone Duo.

There is one hint. 9to5Mac found new reading controls in Apple Books in iOS 27.2 beta 3, such as a progress bar and moved buttons, and guessed they were made with iPhone Duo in mind. Apple did not say so, so we count it as a hint and nothing more.

Will your reading apps still work on iPhone Duo?

Yes. Apple says every app runs on iPhone Duo, but how much of the open screen it uses depends on the tools it was built with. Apps built with the iOS 26 SDK or earlier sit in the middle of the open screen with empty space around them. Only apps built with the iOS 27.1 SDK use the full screen.

Apple started accepting iPhone Duo builds on 5 October 2026. A current version released before that day came out before Apple accepted them. A version released after it may or may not be built for iPhone Duo, and the release notes are the easiest place for its maker to tell you.

What should a reading app do on iPhone Duo?

Here are the seven things we would look for, ranked by how much they matter to a reader. They are our checklist, built from Apple's design guidance and our own measurements in Apple's simulator. We wrote it before the phone went on sale, so treat it as a checklist for the updates, not a verdict.

1. It fills the open screen. Apple says only apps built with the iOS 27.1 SDK use the full display. An app built with the iOS 26 SDK or earlier sits in a window in the middle of the 7.6-inch screen, which wastes the reason you bought the phone.
2. It puts one page on each side of the fold. Folded like a book and held sideways, the screen measured 951 x 669 points in the simulator, split into two 455.5-point pages by a 40-point fold (every pose in points). That fold sits where a paper book's gutter does, so a two-page spread fits it well.
3. It keeps buttons out of the fold. Apple's guidelines say to keep important things clear of the centre. Page-turn zones, the menu and the progress bar should sit on one page or the other, never in the crease.
4. It shows a double-page comic spread whole. Apple's 'Strike a pose' talk says a photo across a book's spine stops reading as one picture. A comics app should offer a way out, like holding the phone upright for a single 669 x 951 point screen.
5. It keeps your place when you fold. Apple's guidelines ask apps to keep their state the same on both screens. Close the phone mid-chapter and the outer screen should open on the same page.
6. It reads well with the phone closed. The outer screen is 466 x 678 points, and Apple moves toolbars to the side there to save height for content. A good reader works one-handed on it, not only when open.
7. It works in Split View and propped up. Apple's Split View puts two apps side by side, and each half measured about 469 points wide in the simulator, enough for an article beside your notes (how to start Split View). Propped on a table, Apple suggests content on the top half and controls on the bottom.

Where do the big reading apps stand?

Here is where the reading apps people ask about most stood on 9 October 2026, sorted by kind of reading. Every app below runs on iPhone Duo, because every iPhone app does. None says in its current release notes that it was made for iPhone Duo, so treat each one as unconfirmed until it does.

Ebooks and library books

Kindle 7.69 came out on 9 October with the note 'Several Bug fixes and improvements.' Kobo 11.5.1, from 6 October, improves reading progress, syncing and audiobooks. Libby 9.2.6 is dated 1 October, before Apple accepted iPhone Duo builds. Apple Books has no iPhone Duo documentation from Apple.

Comics, manga and webtoons

Marvel Unlimited (15 July), DC Universe Infinite (26 August), Shonen Jump (8 September), Panels (18 September), WEBTOON (28 September) and MANGA Plus (29 September) all had a current version from before 5 October. GlobalComix 2.2.53 came out on 6 October and promises 'No flashy new features today.' Our take: vertical-scroll webtoons should suit the open phone held upright, which is 669 points wide.

News

The New York Times 11.95.0 (6 October) lists 'general bug fixes and improvements', and Substack 3.19.0 (5 October) lists 'Bug fixes and performance improvements.' Apple News has no iPhone Duo documentation from Apple. A news app that already shows a sidebar on iPad has a head start, because Apple says an app on the inner screen should look like a natural extension of its iPad layout.

Read-it-later and RSS

Readwise Reader 8.25 (8 October) adds new voices and reading themes, with no word on iPhone Duo. Instapaper (21 September), NetNewsWire (21 September), Matter (23 September), GoodLinks (23 September) and Reeder (2 October) all had a current version from before 5 October.

Is there a two-page PDF mode on iPhone Duo?

Maybe, but Apple has not documented one. On 6 October 2026, Mac Observer reported a video from a code researcher showing a two-page PDF layout in Quick Look, Apple's built-in file previewer, with one page on each side of the fold. Apple has not confirmed it, and nobody has shown whether reading apps can use it.

How can you check a reading app yourself?

It takes about a minute per app, and you do not need an iPhone Duo for the first two steps. A missing mention does not prove an app is broken, because an app built from Apple's standard parts can adapt without its maker saying so. But a written note is the only promise you get before you buy.

1. Read What's NewOpen the app's App Store page and look through What's New and the version history for 'iPhone Duo'.
2. Check the dateA version released before 5 October 2026 came out before Apple accepted iPhone Duo builds.
3. Fold it on the phoneOpen a book and fold the phone halfway, like a paperback. A ready app keeps the text and buttons off the fold.

If you want apps that are already confirmed for iPhone Duo, even if none of them is for reading, our list of 10 apps with confirmed support checks each one against a written source.

What else do people ask?

Three questions people ask about reading on iPhone Duo, from Kindle to Split View. The answers come from the App Store, Apple's own pages and our simulator measurements, all read on 9 October 2026. Reading apps update often, so check What's New on the App Store before you rely on any of them.

Is iPhone Duo good for reading books?

On paper, yes. The inner screen is 7.6 inches and folds like a book, with two pages of 455.5 points each when half folded in Apple's simulator. But on 9 October 2026 no ebook app had confirmed iPhone Duo support, so how it reads depends on updates that had not shipped.

Does Kindle support iPhone Duo?

Not in writing on 9 October 2026. Kindle version 7.69, released that day, lists only bug fixes and improvements. Kindle still runs on iPhone Duo, like every iPhone app, but Kindle's release notes do not say whether it uses the full open screen or the fold.

Can you read in Split View on iPhone Duo?

Yes. Apple says Split View lets two apps sit side by side on iPhone Duo. In Apple's simulator each half measured about 469 points wide with the open phone held sideways, which leaves room for an article next to your notes.