Entertainment v26.102.0
Does WEBTOON work on iPhone Duo?
Mostly. WEBTOON 26.102.0 is built with the iOS 27.0 SDK, so it fills most of iPhone Duo's inner display but leaves some space unused.
Apple lists WEBTOON as made for iPhone Duo, but the version on the App Store today (26.102.0) is built with the iOS 27.0 SDK, which can’t use the whole inner display. This page switches to Built for Duo when a version built with iOS 27.1 or later ships.
At a glance
- Inner display (7.6″)
- Partly adapted
- Outer display (5.4″)
- Works normally
- Built with
- iOS 27.0 SDK
- Version 26.102.0, read Nov 3, 2026
- iPad version
- Yes
- Layout already handles big screens
- Latest version
- v26.102.0
- Nov 2, 2026
- Duo in release notes
- Not yet
About WEBTOON
WEBTOON is made by NAVER WEBTOON Ltd. and first came out on the App Store in July 2014. It has 516,720 ratings on the US App Store, averaging 4.8 stars. Version 26.102.0 came out on Nov 2, 2026 and needs iOS 16.0 or later. It's free to download. Among the 45 video & streaming apps we track on the US App Store, 22 already fill the inner display, 7 are partly adapted and 15 still show black bars. By number of ratings, WEBTOON is #19 of them.
From its App Store listing:
Join the largest manga, comics, and manhwa community in the world with millions of fans and creators on WEBTOON! Why you'll love WEBTOON: - Access millions of episodes for FREE! - Explore the world’s largest selection of webcomics spanning diverse genres like action, romance, thriller and everything in between. - Now you can read or watch fan-favorite stories like never before with Video Episodes …
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.
Apple named it in its iPhone Duo launch roundup on October 22: it shows comics on the larger display.
In Split View
iPhone Duo is the first iPhone that can show two apps side by side, and every app takes part — including WEBTOON. 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
- Adaptive layoutRearranges into sidebars or multiple panes on the inner display instead of just stretching.
Evidence & history
Apple,
Developers bring incredible new app experiences to iPhone Duo (Apple Newsroom)
Apple says it shows comics on the larger display.
App build,
Version 26.102.0 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 → Built for Duo — Named in Apple’s iPhone Duo launch roundup
- : 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 26.102.0 · Nov 2, 2026
- Minor bug fixes
Questions
Does WEBTOON work on iPhone Duo?
Mostly. WEBTOON 26.102.0 is built with the iOS 27.0 SDK, so it fills most of iPhone Duo's inner display but leaves some space unused.
Does WEBTOON 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 WEBTOON 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 WEBTOON 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 WEBTOON 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 WEBTOON within about a day of its release and update this page.
What can I do about the black bars until then?
Use WEBTOON 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.