Business v26.10.00
Does Acrobat Reader work on iPhone Duo?
Mostly. Acrobat Reader 26.10.00 is built with the iOS 27.0 SDK, so it fills most of iPhone Duo's inner display but leaves some space unused.
At a glance
- Inner display (7.6″)
- Partly adapted
- Outer display (5.4″)
- Works normally
- Built with
- iOS 27.0 SDK
- Version 26.10.00, read Nov 1, 2026
- iPad version
- Yes
- Layout already handles big screens
- Latest version
- v26.10.00
- Oct 30, 2026
- Duo in release notes
- Not yet
About Acrobat Reader
Acrobat Reader is made by Adobe Inc. and first came out on the App Store in October 2011. It's #73 on today's US App Store top charts. It has 665,169 ratings on the US App Store, averaging 4.6 stars. Version 26.10.00 came out on Oct 30, 2026 and needs iOS 18.3 or later. It's free to download. Among the 46 productivity apps we track on the US App Store, 28 already fill the inner display, 3 are partly adapted and 15 still show black bars. By number of ratings, Acrobat Reader is #18 of them.
From its App Store listing:
Adobe Acrobat Reader is the free PDF reader for opening, reading, filling in, signing and commenting on PDFs on your iPhone or iPad. It’s the world’s most trusted PDF reader, PDF editor and PDF maker, with more than 635 million installs and an App Store Editors’ Choice award. You also don’t need a subscription to read, fill in or sign PDFs. Need to do more? With Acrobat Premium, you can create PDF…
On the inner display
Built with the iOS 27 SDK, the app extends across most of the inner display, but some areas stay empty. It's usable, just not polished.
In Split View
iPhone Duo is the first iPhone that can show two apps side by side, and every app takes part — including Acrobat Reader. Open it on the inner display, then add a second app next to it. You can save the pair and come back to it later.
Duo-specific features
None confirmed yet. Duo-specific features include side toolbars, layouts that react to the fold, and content on the outer display while the app is open inside.
Evidence & history
App build,
Version 26.10.00 is built with the iOS 27.0 SDK
Apple gives apps built with the iOS 27.0 SDK more of the inner display, with some space left over.
- : Not confirmed yet → Black bars — built with the iOS 26.2 SDK
- : Black bars → Partly adapted — built with the iOS 27.0 SDK
Latest release notes
Version 26.10.00 · Oct 30, 2026
NEW - SECTION NAVIGATION WITH READ ALOUD Jump between chapters, sections, and headings while listening. See which section is playing and how many are left, right from the player bar.
Questions
Does Acrobat Reader work on iPhone Duo?
Mostly. Acrobat Reader 26.10.00 is built with the iOS 27.0 SDK, so it fills most of iPhone Duo's inner display but leaves some space unused.
Does Acrobat Reader work on the outer display?
Yes. iPhone Duo's 5.4-inch outer display behaves like a regular iPhone screen, so every iPhone app works there as usual.
Can I use Acrobat Reader in Split View on iPhone Duo?
Yes. On iPhone Duo every app can be placed side by side with another app on the inner display — developers don't need to opt in. How comfortable it feels at half width depends on the app's layout.
Why does Acrobat Reader have black bars on iPhone Duo?
Apps built with the iOS 26 SDK or earlier run in a phone-sized window on the inner display, and iOS 27 builds can still leave some space empty. The bars disappear once the developer rebuilds the app with the iOS 27.1 SDK — you only need to update the app.
When will Acrobat Reader fill iPhone Duo's inner display?
When its developer releases an update built with the iOS 27.1 SDK or later. We read the SDK of every new version of Acrobat Reader within about a day of its release and update this page.
What can I do about the black bars until then?
Use Acrobat Reader on the outer display, where it works like on any iPhone, or put it in Split View next to another app on the inner display so less of the screen goes unused.