I spent time this morning reading several articles about about the iPhone Duo and I look forward to the more detailed reviews to come. I think the biggest impact of the iPhone Duo will be with how it spurs software development for the form factor. My observation from afar of the Android based foldables has been that neither Google nor other developers have done enough to take full advantage of the form factor.

Apple’s Surprise and Shine Event: All the Small Things

John Voorhees https://www.macstories.net/news/apples-surprise-and-shine-event-all-the-small-things/

“Apple has released a six-video playlist on YouTube and in the Apple Developer app called “Get ready for iPhone Duo” to help get designers up to speed with the phone’s new format. The Human Interface Guidelines have been updated too.”

“Continuous Angle API lets developers receive ongoing updates about the Duo’s hinge angle to power interactive effects.”

The iPhone Duo: Tradeoffs, but Fewer Than Feared

Dan Moren https://sixcolors.com/post/2026/09/the-iphone-duo-tradeoffs-but-fewer-than-feared/

“However, when folded, the Duo is itself a chunky 11.3mm. I found myself wondering if that was, in turn, the thickest iPhone ever. The answer? Just barely not. But you have to go all the way back to 2009’s iPhone 3GS, which—like its predecessor, the iPhone 3G—rang in at 12.3mm, in large part due to its slightly convex back.”

iPhone Duo Is Thicker and Heavier Than Basically Every Android Foldable

Will Sattelberg https://9to5google.com/2026/09/09/iphone-duo-thicker-and-heavier-than-basically-every-android-foldable/

“But no matter how “modern” the iPhone Duo appears at first glance compared to Google and Samsung’s respective first-gen entries, it loses out on one big metric: bulk. The iPhone Duo measures in at 11.3mm thick when closed and weighs a whopping 254 grams. Compared to Apple’s most recent foldable rivals, that’s 15 grams (or three nickels worth) heavier than the Pixel 11 Pro Fold, 39 grams heavier than the Galaxy Z Fold 8 Ultra, and a whopping 53 grams heavier than the similarly-shaped Fold 8. Each of those phones is significantly thinner too, ranging anywhere between 8.9mm to 10.1mm when closed.

  • iPhone Duo: 254g, 11.3mm closed
  • Pixel 11 Pro Fold: 239g, 10.1mm closed
  • Samsung Galaxy Z Fold 8 Ultra: 215g, 8.9mm closed
  • Samsung Galaxy Z Fold 8: 201g, 9.7mm closed”

Why Your iPhone Duo Will Inevitably Develop a Screen Crease

Apple Insider https://appleinsider.com/articles/26/09/10/why-your-iphone-duo-will-inevitably-develop-a-screen-crease

“The iPhone Duo developing a crease over time is inevitable as the tides, and a matter of physics and engineering. Here’s how and why that crease develops, and what Apple has done to mitigate it.”