iPhone Duo review: The future is foldable

Apple's iPhone Duo review highlights the device’s unique foldable form factor, noting that its compact notebook‑style chassis houses an iPad‑like inner display that flips open for a larger screen experience. For website owners, the Duo’s dual‑screen design means browsers will report two distinct viewport sizes and potentially two separate user‑agent strings when the device switches between folded and unfolded modes. This creates a new traffic pattern: bots and analytics tools may see sudden spikes in page‑view dimensions or duplicate sessions as the same visitor toggles between screens. If your site serves adaptive content or relies on device‑specific rendering, you’ll need to account for these rapid context changes to avoid mis‑classifying legitimate Duo users as suspicious bot activity. **Actionable tips:** 1. Update your llms.txt to include the new Apple WebKit user‑agent identifiers for both the folded and unfolded states (e.g., “Mozilla/5.0 (iPhone; CPU iPhone OS …) AppleWebKit/… (Folded)” and “… (Unfolded)”). 2. Configure your bot‑tracking platform to treat viewport‑size shifts from the same IP within a short window as a single session rather than separate hits, reducing false‑positive bot flags. 3. Deploy a JavaScript listener that logs the `window.innerWidth`/`innerHeight` on orientation change, feeding the data into your analytics to distinguish genuine Duo users from crawlers that cannot emulate the foldable transition.