Productivity v1.15.0
Does Obsidian work on iPhone Duo?
Mostly. Obsidian 1.15.0 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 1.15.0, read Nov 3, 2026
- iPad version
- Yes
- Layout already handles big screens
- Latest version
- v1.15.0
- Nov 2, 2026
- Duo in release notes
- Not yet
About Obsidian
Obsidian is made by Dynalist Inc. and first came out on the App Store in July 2021. It has 2,809 ratings on the US App Store, averaging 4.5 stars. Version 1.15.0 came out on Nov 2, 2026 and needs iOS 15.6 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, Obsidian is #42 of them.
From its App Store listing:
Obsidian is a powerful knowledge base that works on top of a local folder of plain text Markdown files. It is a second brain, for you, forever. Now available on the go for iOS! Features include: - Customizable toolbar - Pull down quick actions - Graph view - Community plugins - Themes - Sidebar pinning for tablet - iCloud vaults
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 Obsidian. 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 1.15.0 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 1.15.0 · Nov 2, 2026
Quick Capture can now record voice notes and transcribe them as you speak, including on the Lock Screen. Recordings can be saved to your vault. Requires iOS 26. - Added Quick Capture to Spotlight actions and Siri, e.g. "Open Quick Capture in Obsidian". - Setting Note Title to 'Automatic' in Quick Capture uses the first 80 characters of the capture as the note title. - Added PDF export for notes on mobile. - Manage vaults now uses the same design as the welcome screens, and can create a new Obsidian Sync vault. - Bases: Filters on phones are now in the Display menu, where each filter is a card that can be dragged to reorder. - Bases: On phones, the number of results now shows in the search bar instead of under the view name. - Mobile: Pressing and holding no longer shows a ripple animation on devices that vibrate. Devices without vibration, like iPads, still show it. - Tab switcher: Tabs can now be dragged from one tab group to another. - Fixed the comment button missing from the default editor toolbar. - Fixed the last community plugins and themes being hidden behind the keyboard while searching.
Questions
Does Obsidian work on iPhone Duo?
Mostly. Obsidian 1.15.0 is built with the iOS 27.0 SDK, so it fills most of iPhone Duo's inner display but leaves some space unused.
Does Obsidian 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 Obsidian 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 Obsidian 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 Obsidian 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 Obsidian within about a day of its release and update this page.
What can I do about the black bars until then?
Use Obsidian 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.