The iPhone Duo starts at $1,999 for a 256 GB model and can rise to $3,000 for the 2 TB version. It opens to a 7.6‑inch Super Retina XDR display and folds onto a 5.4‑inch outer screen.

Apple entered the foldable market after years of watching Samsung, Google and other makers experiment with foldable phones. Observing competitors helped Apple decide the right moment to act.

One of the biggest complaints about foldables is the visible crease. Apple developed a custom nano‑texture finish that reduces glare and minimizes the visibility of the crease, giving the screen a matte feel.

Instead of Face ID, the Duo uses Touch ID built into the side button, allowing multiple fingerprints and unlocking from different angles. The chassis is made of Grade 5 titanium and the device carries an IP68 dust‑and‑water rating.

These design choices show how competition and advances in materials and software convinced Apple that a premium foldable could meet its quality standards while offering a new user experience.