Apple's iPhone Duo reviews published October 21, 2026, with most outlets converging on a fun-but-wait verdict. Battery results vary widely, with Allison Johnson reporting drastically worse life, likely from leaving the inner screen open. Durability tests disagree: Joanna Stern's rig survived 32,000 folds, while a 10,000-fold test found the crease more visible. Nilay Patel raised his score from six to seven after a week, and John Gruber calls the closed device the worst iPhone Apple has made while saying the inner device beats the iPad in many ways. Owners now report screen time tilting away from vertical video because Instagram is less addictive on the small outer screen.