Apple’s iPhone Duo is the first iPhone that can run two apps side by side, but anyone expecting the sort of freedom that Split View offers on iPad might want to temper their expectations. Apple’s iPhone Duo marketing materials talk up app pairs and side-by-side windows, but it doesn’t mention anything about resizing them. There’s a reason for that.
If you put two apps side by side on the iPhone Duo’s 7.6-inch foldable display, you can’t drag the divider between them to make one app take up more space than the other. It’s a fixed 50/50 split, regardless. That’s likely to be a disappointment to anyone who’s used Split View on the iPad.
IPad owners have been able to resize apps in Split View when in landscape mode ever since 2015 when iOS 9 introduced the feature. So why does Apple not let you resize apps on the iPhone Duo. It’s likely down to the device’s display geometry.
When iPhone Duo arrives next month, many third-party apps might not work as well as Appleโs built-in apps. Thereโs a reason for that, at least initially, though the situation should improve over time.
The race to build great iPhone Duo apps is about to begin. Hands-on with the foldable iPhone Duo [Gallery] Chance Miller Sep 9 2026.
Both the inner and outer displays share the same 1:1.4 aspect ratio, and each half of the inner display works out to roughly the same size and shape as the outer screen. So an even split gives each app a canvas it already has to support, with the divider sitting neatly on the fold.
If you were able to drag the boundary around, not only would it create a bunch of in-between sizes that wouldn’t fit neatly on the outer screen, it would also be a nightmare for developers to build support into their iPhone apps. Despite the lack of resizing capability, the iPhone Duo’s foldable screen still has a lot of benefits.
It allows you to quickly swap between apps, open two windows of the same app, and have a conversation over Messages while looking at another app’s content on the other side of the screen, in both landscape and portrait modes. You can also save pairs of apps to come back to later.
Using apps side-by-side on iPhone Duo. So unfortunately, you can’t change the app size when you use split view on the iPhone Duo.
็ป้ขๅๅฒใใ้ใฎใขใใชใตใคใบใฏๅคใใใใชใไปๆงใงใ๏ฅฒ pic.twitter.com/1K1peXeivK — g.O.R.i๏ผใดใชใใผ็ฎก็ไบบ๏ผ (@planetofgori) September 10, 2026 Apple’s first iPhone with a foldable display was always going to having a learning curve, especially for users coming from the iPad. With a starting price of $1,999, iPhone Duo pre-orders begin Friday, October 16, with availability starting Friday, October 23.
Related Roundup: iPhone Duo Buyer’s Guide: iPhone Duo (Coming Soon) Related Forum: iPhone This article, " iPhone Duo Can Do Split View, But Not Like Your iPad " first appeared on com Discuss this article in our forums. IPhone Duo Can Do Split View, But Not Like Your iPad.
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