Apple · 2026
iPhone Duo
Apple book-style foldable phone with inner and outer OLED displays, A20 Pro and Touch ID.
RANKED OVERVIEW
TL;DR: What this phone is about
Apple book-style foldable phone with inner and outer OLED displays, A20 Pro and Touch ID. Here are the updates that matter most in day-to-day use.
- Book-style foldable designA 7.6-inch inner display opens for a tablet-like workspace while the 5.4-inch outer display handles everyday tasks.
- A20 Pro insideThe foldable keeps pace with the iPhone 18 Pro family on core performance and software support.
- Touch ID instead of Face IDThe side-button fingerprint sensor reflects the constraints of the foldable design.
- $1,999 starting priceThe Duo is a specialist device with a premium well above the conventional iPhone range.
QUICK VERDICT
Is it worth considering?
Best for
- People who want a foldable iPhone
- Multitasking across two screen sizes
- Early adopters comfortable paying a premium
Watch out for
- Very high starting price
- Foldable hardware is more complex than a slab phone
- No dedicated telephoto camera
PRICE POSITION
How it compares with the US average
KEY SPECS
At a glance
- Displays
- 7.6-inch inner · 5.4-inch outer OLED
- Chip
- A20 Pro
- Build
- Titanium frame and hinge cover
- Storage
- 256GB, 512GB, 1TB, 2TB
- Biometrics
- Side-button Touch ID
- SIM
- eSIM-only worldwide
WHAT CHANGED
What is new this generation?
Form factor
Introduces a book-style foldable design to the iPhone range.
Displays
Adds a 7.6-inch inner OLED and a 5.4-inch outer OLED display.
Biometrics
Uses side-button Touch ID rather than Face ID.
Cameras
Uses two 48MP Fusion cameras without a dedicated telephoto lens.
COMPARE
What changed from iPhone 17?
The iPhone 18 Pro is easiest to understand against the previous Pro and the standard iPhone 17. Here are the main differences at a glance.
| Feature | iPhone Duo | iPhone 18 Pro | Galaxy Z Fold alternative |
|---|---|---|---|
| Main display | 7.6-inch inner OLED | 6.3-inch ProMotion OLED | Foldable inner display |
| Outer display | 5.4-inch OLED | Not applicable | Cover display |
| Chip | A20 Pro | A20 Pro | Varies by model |
| Biometrics | Side-button Touch ID | Face ID | Varies by model |
| Launch price | $1,999 | $1,199 | Varies by model |
RELATED KYM COVERAGE
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CRITIC REVIEWS
What the experts say
Independent reviews from established phone publications.
OWNER REVIEWS
What owners say
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Related phones
A few alternatives worth comparing, based on price, specifications, performance, cameras and value.
Google Pixel 11 Pro Fold
Google Pixel 11 Pro Fold sits closest to the iPhone Duo on launch price at From $1,899, making it a direct alternative if budget is the deciding factor.
iPhone 18 Pro
iPhone 18 Pro is a close match on the fundamentals, with a 6.3-inch display and a comparable everyday setup.
Samsung Galaxy Z Fold 8
Samsung Galaxy Z Fold 8 is the performance alternative, with Snapdragon 8 Elite Gen 5 for Galaxy aimed at the same kind of demanding everyday use.
iPhone 18 Pro Max
iPhone 18 Pro Max is worth a look if the camera matters most, with a camera setup built for serious everyday shooting.
Nothing Phone (4b)
Nothing Phone (4b) is the value wildcard: it costs From $399 and makes a strong case for spending less without giving up the basics.
Samsung Galaxy S26 Ultra
Samsung Galaxy S26 Ultra is another strong option, with a critic consensus of 90 / 100 and a different balance of features and trade-offs.