Social Networking v26.43.75
Does WhatsApp Messenger work on iPhone Duo?
Yes. WhatsApp Messenger 26.43.75 is built with the iOS 27.1 SDK, so it can use iPhone Duo's whole inner display. We haven't seen Duo-specific features yet.
At a glance
- Inner display (7.6″)
- Full screen
- Outer display (5.4″)
- Works normally
- Built with
- iOS 27.1 SDK
- Version 26.43.75, read Nov 3, 2026
- iPad version
- Yes
- Layout already handles big screens
- Latest version
- v26.43.75
- Nov 2, 2026
- Duo in release notes
- Not yet
About WhatsApp Messenger
WhatsApp Messenger is made by WhatsApp Inc. and first came out on the App Store in May 2009. It's #19 on today's US App Store top charts. It has 18,899,624 ratings on the US App Store, averaging 4.7 stars. Version 26.43.75 came out on Nov 2, 2026 and needs iOS 15.1 or later. It's free to download. Among the 22 social apps we track on the US App Store, 11 already fill the inner display, 4 are partly adapted and 7 still show black bars. By number of ratings, WhatsApp Messenger is #3 of them.
From its App Store listing:
Bring your group together on WhatsApp. WhatsApp from Meta is a free messaging and calling app for the people and groups in your life. Bring your best friends, parent group, study group, or neighborhood together to chat, make plans, and share moments. Get everyone into the conversation Invite people with a link or QR code. Names and profile photos help you know who's who, and shared message history…
On the inner display
The app reaches the edges of the inner display. Text and controls stay a comfortable size instead of being blown up.
WhatsApp released a native iPad app in May 2025 that supports Split View, Slide Over and Stage Manager. How it will look on iPhone Duo’s inner display is not confirmed yet.
In Split View
iPhone Duo is the first iPhone that can show two apps side by side, and every app takes part — including WhatsApp Messenger. 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 26.43.75 is built with the iOS 27.1 SDK
Apps built with the iOS 27.1 SDK or later can use the whole inner display.
- : Not confirmed yet → Full screen — built with the iOS 27.1 SDK
Latest release notes
Version 26.43.75 · Nov 2, 2026
We update the app regularly to fix bugs, optimize performance and improve the experience. Thanks for using WhatsApp!
Questions
Does WhatsApp Messenger work on iPhone Duo?
Yes. WhatsApp Messenger 26.43.75 is built with the iOS 27.1 SDK, so it can use iPhone Duo's whole inner display. We haven't seen Duo-specific features yet.
Does WhatsApp Messenger 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 WhatsApp Messenger 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.