Apple has unveiled its first foldable handset, the iPhone Duo, and it folds horizontally like a passport. The design breaks from the dominant clamshell format used by competitors and instead opens side to side, creating a wider inner display that resembles a mini tablet when fully extended.

What You Need to Know

The iPhone Duo is Apple's answer to the foldable phone trend, using a horizontal fold mechanism that mirrors a passport. It reportedly delivers a larger usable screen while keeping the closed footprint compact. This marks Apple's entry into a segment long dominated by Samsung and could drive mainstream adoption. The device is expected to launch in late 2025.

Design That Flips the Script

Most foldable phones today fold vertically, like a clamshell or a book. The iPhone Duo folds horizontally, meaning the hinge runs along the top and bottom edges rather than the side. When closed, the phone becomes a wide, narrow slab. When opened, it reveals a full rectangular screen without a crease visible in the center. Apple has reportedly engineered a new hinge mechanism that allows the screen to bend without a visible seam, a challenge that has plagued other foldables.

The horizontal orientation offers a few advantages over vertical designs. The device provides a more symmetrical look and keeps the outer display usable at full width. Users can view content in landscape mode without rotating the phone. The wide form factor also fits naturally into pockets and bags, much like a passport.

  • Symmetrical design: Both halves are identical in size, improving balance and grip.
  • Larger inner display: The unfolded screen reaches 7.9 inches diagonally, competing with mini tablets.
  • Better app compatibility: The wider aspect ratio matches standard tablet apps without letterboxing.
  • Durable hinge: Apple uses a new folding glass reinforced with liquid metal to resist wear.

Why Apple Chose a Different Path

Apple's decision to fold horizontally, like a passport, reflects a strategic bet on productivity. While clamshell foldables emphasize portability, the iPhone Duo targets users who want a phone that doubles as a small tablet. The company's ecosystem plays a key role here. Apps like Final Cut Pro, Logic Pro and multitasking tools feel more natural on a wider screen than on a tall foldable.

The horizontal fold also simplifies accessory design. Cases, chargers and sleeves can treat the closed phone as a single rectangular unit rather than a tall narrow device. Apple has patented magnetic alignment features that keep the two halves perfectly aligned when folded.

Why This Matters

Apple's entry into the foldable market with a horizontal design could reshape the category. If the iPhone Duo succeeds, other manufacturers may adopt similar passport-style folds, moving the industry toward larger unfolded screens. The device also pressures Samsung, which has dominated foldables with its vertical Z Fold line. Apple's focus on app optimization and durability could set a new benchmark for what consumers expect from a foldable phone. For buyers, the choice is no longer just between a regular phone and a foldable, but among different fold philosophies: clamshell, book style or passport style. The iPhone Duo represents a bet that many users will prefer a wider workspace over a taller pocketable device.