Review: Apple iPhone Duo

Apple made an astonishingly good first foldable. Now iOS and third-party apps need time to catch up.

Photograph: Julian Chokkattu

Multiple Buying Options Available

Polished hardware with a graceful hinge. Nanotexture finish cleverly hides the crease. Makes multitasking easy. Fun camera features to make use of the multiple screens. Reliable battery life.

Heavy. Some multitasking elements are too rigid. Lots of apps aren’t optimized (yet).

It’s a little hard to review the iPhone Duo. I’ve been toting Apple’s first folding smartphone for the past week, and several apps I’ve tried to open on the sprawling 7.6-inch screen look awful. Thick, black bars on the sides, with a phone-sized app in the middle of this tablet-like display. But you likely won’t encounter this problem once the Duo is in your hands.

In the past day, a handful of apps I use regularly updated to add full support for the iPhone Duo’s screen sizes and vertical user interface elements.…