Apple's first foldable, the iPhone Duo, has stirred discussion since launch. According to a Wall Street Journal review published in October 2026, the device offers a poor one-handed experience in phone mode: it is wide, thick and heavy, and prolonged use tires the hand. Meanwhile, a Reddit user shared a workaround of registering the base of the index finger for Touch ID, drawing attention in the community.
WSJ review: one-handed use strains the hand, fatigue is obvious
WSJ reporter Nicole Nguyen described the experience in her review. She said that every time she held the Duo one-handed in phone mode, she felt its heft: it is wider and thicker than a Pro iPhone and heavier even than competing foldables.
"Every time I used the Duo in phone mode, one-handed, I felt its heft. It's wider and thicker than a Pro iPhone — and heavier, even compared with competing foldables. My hand actually hurts after using the Duo nonstop, straining to grip the device securely while trying to reach the far edge of the screen."
On the weight issue, an Apple spokesperson told the Wall Street Journal that the Duo uses a titanium frame to improve durability, while other foldables mostly use lighter aluminum. Apple also moved the Dock and frequently used controls to the right side for right-handed use, but the review noted that left-handed users are affected as a result. Nguyen said her thumb still hit its limit repeatedly when turning off the camera flash or typing the letter "A."
Nguyen also acknowledged that users accustomed to two-handed operation may not see this as a problem. But she personally hopes future Duos will be lighter and thinner. Daring Fireball's commentary argued that foldables are inherently two-handed devices, even when closed, and noted that the Duo's outer screen is already short for displaying content.
Reddit user shares Touch ID workaround
In Reddit's r/iPhoneDuo community, a user shared a workaround for the one-handed problem: registering the lowest part of the right index finger as Touch ID. The user said that part of the finger sits naturally when swiping up on the phone, solving the inconvenience of checking notifications on the lock screen.
"This is arguably better than Face ID. The speed keeps up, and the phone doesn't need to be facing you to unlock — you can just pick up the phone and do it."
MacRumors' Tim Hardwick cited the "arguably better than Face ID" claim. Daring Fireball's commentary called the idea clever and said it does seem to work if you hold the phone the right way, but called the claim that it beats Face ID a "joke," adding that "the placebo effect is strong, but it will fade fast."
Podcast and developer community keep the discussion going
On the podcast front, episode 456 of The Talk Show, aired on October 25, 2026, focused on the iPhone Duo, with Joanna Stern as guest. In the developer community, Daring Fireball on October 27 recommended an app called "Tiny Computers for iPhone Duo," saying that if you have a Duo and don't try it, "you're not hooked up right." An update, however, quoted Cabel Sasser's comment that although the app is incredibly fun, it was clearly made by a young Claude-aided developer who never used any of these actual old computers, so there are a lot of ahistorical details.
What to watch
The one-handed controversy sparked by the iPhone Duo's thick, heavy design, and users' spontaneous Touch ID workaround, reflect the trade-off foldables make between form-factor innovation and everyday practicality. Whether Apple will adjust the design of future models in response to user feedback is worth watching.