Health & Fitness v26.44.0
Does MyFitnessPal work on iPhone Duo?
Mostly. MyFitnessPal fills most of iPhone Duo's inner display but still leaves some unused space around the app.
At a glance
- Inner display (7.6″)
- Partly adapted
- 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
- v26.44.0
- Nov 3, 2026
- Duo in release notes
- Not yet
About MyFitnessPal
MyFitnessPal is made by MyFitnessPal, Inc. and first came out on the App Store in December 2009. It's #44 on today's US App Store top charts. It has 2,388,470 ratings on the US App Store, averaging 4.7 stars. Version 26.44.0 came out on Nov 3, 2026 and needs iOS 18.0 or later. It's free to download. Among the 27 health & fitness apps we track on the US App Store, 9 already fill the inner display, 4 are partly adapted and 14 still show black bars. By number of ratings, MyFitnessPal is #2 of them.
From its App Store listing:
Eat better, train smarter, and hit your goals with MyFitnessPal, the calorie counter and nutrition tracker with a built-in AI Coach. Join the millions of users who've created over 100 billion food logs and counting! Calories, macros, food, workouts – track it all in one place with one of the most comprehensive health & fitness tracker apps available. Your new AI Coach gives you personalized guidan…
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 MyFitnessPal. 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 26.43.0 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 26.44.0 · Nov 3, 2026
Happy Halloween to all who celebrate the spookiest today of the year. No major feature updates or bugs to report this week. Just the quiet, steady upkeep that keeps the app running smoother than a protein shake.
Questions
Does MyFitnessPal work on iPhone Duo?
Mostly. MyFitnessPal fills most of iPhone Duo's inner display but still leaves some unused space around the app.
Does MyFitnessPal 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 MyFitnessPal 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 MyFitnessPal 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 MyFitnessPal 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 MyFitnessPal within about a day of its release and update this page.
What can I do about the black bars until then?
Use MyFitnessPal 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.