Yes. iPhone Duo is Apple’s official name for its first folding iPhone, announced on 9 September 2026.
It is widely referred to by other names — the folding iPhone, the foldable iPhone, the Apple fold, the iPhone flip, and the iPhone 18 Fold — but these all describe the same device. Apple’s developer material uses “iPhone Duo” throughout, so that is the term to search for when looking for documentation.
It runs iOS 27 and is a separate product from the iPhone 18 and iPhone 18 Pro announced alongside it, which are conventional single-screen phones.
Why the naming matters for searching
Apple’s developer material uses iPhone Duo throughout, so that is the term to search for when looking for documentation, API names or Tech Talks. Searching “foldable iPhone” will mostly surface consumer coverage rather than the developer material.
It is a separate product from the iPhone 18 and iPhone 18 Pro announced alongside it, which are conventional single-screen phones and need no layout work beyond what you already do.