Book v7.70.2
Does Amazon Kindle work on iPhone Duo?
Mostly. Amazon Kindle 7.70.2 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 7.70.2, read Oct 29, 2026
- iPad version
- Yes
- Layout already handles big screens
- Latest version
- v7.70.2
- Oct 27, 2026
- Duo in release notes
- Not yet
About Amazon Kindle
Amazon Kindle is made by AMZN Mobile LLC and first came out on the App Store in March 2009. It has 5,884,659 ratings on the US App Store, averaging 4.9 stars. Version 7.70.2 came out on Oct 27, 2026 and needs iOS 17.0 or later. It's free to download. Among the 30 utilities & lifestyle apps we track on the US App Store, 9 already fill the inner display, 3 are partly adapted and 18 still show black bars. By number of ratings, Amazon Kindle is #3 of them.
From its App Store listing:
READ ANYTIME, ANYWHERE On the bus, on your break, in your bed—never be without a book. Kindle books you have purchased on Amazon will automatically appear in your app. Kindle Unlimited and Amazon Prime members can select and download Kindle books directly in the app. FIND YOUR NEXT GREAT READ • Read the books you buy on Amazon in the Kindle app. Choose from over six million Kindle books (including…
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 Amazon Kindle. 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 7.70.2 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 → Partly adapted — built with the iOS 27.0 SDK
Latest release notes
Version 7.70.2 · Oct 27, 2026
Several Bug fixes and improvements.
Questions
Does Amazon Kindle work on iPhone Duo?
Mostly. Amazon Kindle 7.70.2 is built with the iOS 27.0 SDK, so it fills most of iPhone Duo's inner display but leaves some space unused.
Does Amazon Kindle 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 Amazon Kindle 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 Amazon Kindle 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 Amazon Kindle 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 Amazon Kindle within about a day of its release and update this page.
What can I do about the black bars until then?
Use Amazon Kindle 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.