Games v10.2.0
Does Fishdom work on iPhone Duo?
It works, but with black bars. Fishdom hasn't been updated for iPhone Duo's inner display yet, so it runs in a phone-sized window.
At a glance
- Inner display (7.6″)
- Black bars
- Outer display (5.4″)
- Works normally
- Built with
- Not read yet
- We read each app's build SDK after it updates
- iPad version
- Yes
- Layout already handles big screens
- Latest version
- v10.2.0
- Nov 3, 2026
- Duo in release notes
- Not yet
About Fishdom
Fishdom is made by Playrix and first came out on the App Store in December 2015. It's #84 on today's US App Store top charts. It has 1,151,697 ratings on the US App Store, averaging 4.6 stars. Version 10.2.0 came out on Nov 3, 2026 and needs iOS 13.0 or later. It's free to download. Among the 238 games we track on the US App Store, 34 already fill the inner display, 9 are partly adapted and 187 still show black bars. By number of ratings, Fishdom is #28 of them.
From its App Store listing:
Dive into the fantastic world of Fishdom! You're in for an ocean of exciting levels, scores of adorable fish and pets, and a sea of captivating events! Explore incredible underwater adventures! Unlock aquariums and decorate them to your taste, creating perfect homes for cute fish and their friends. Game Features: ● Original gameplay: beat match-3 levels to create the perfect home for your fish! ● …
On the inner display
Apps built with older SDKs are placed in a phone-sized safe area on a black background. Everything works; you just don't get the bigger screen.
In Split View
iPhone Duo is the first iPhone that can show two apps side by side, and every app takes part — including Fishdom. 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 10.1.6 is built with the iOS 26.2 SDK
Apple runs apps built with the iOS 26 SDK or earlier in a phone-sized window on the inner display.
- : Not confirmed yet → Black bars — built with the iOS 26.2 SDK
Latest release notes
Version 10.2.0 · Nov 3, 2026
Check out the latest Fishdom update! Travel to an ancient castle and find out what lies behind a legend of a vampire! ALSO New aquarium: Mystic Grove New fish: Amber Batfish and Rummy-Nose Tetra Enjoy the game!
Questions
Does Fishdom work on iPhone Duo?
It works, but with black bars. Fishdom hasn't been updated for iPhone Duo's inner display yet, so it runs in a phone-sized window.
Does Fishdom 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 Fishdom 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 Fishdom 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 Fishdom 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 Fishdom within about a day of its release and update this page.
What can I do about the black bars until then?
Use Fishdom 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.