iPhone comparison
iPhone Duo vs iPhone 18 Pro Max
Compare iPhone Duo vs iPhone 18 Pro Max side by side: chip, memory, storage, display, ports, launch price and how each fits in Apple history.
iPhone DuoThe first iPhone that opens into something larger.
iPhone 18 Pro MaxThe largest 18 Pro combines the new variable-aperture 48MP camera system and A20 Pro with Apple’s biggest generational battery-life jump in an iPhone, reaching 45 hours of video playback.At a glance
Both launched in 2026. 8 of 12 specs differ.
Going from the iPhone Duo to the iPhone 18 Pro Max, the display shrinks from 7.6″ to 6.9″ and it gets lighter, 254 g to 249 g. Launch price drops from $1,999 to $1,299.
- Display7.6″6.9″
- Weight254 g249 g
- Launch price$1,999$1,299
Unchanged storage.
Specs side by side
| Spec | iPhone Duo | iPhone 18 Pro Max |
|---|---|---|
| Release | October 23, 2026 | September 18, 2026 |
| Launch price | $1,999 | $1,299 |
| Price today | $2,019 | $1,312 |
| ChipSame | Apple A20 Pro | Apple A20 Pro |
| GraphicsSame | Apple 7-core GPU with Neural Accelerators | Apple 7-core GPU with Neural Accelerators |
| CPU coresSame | 6 | 6 |
| StorageSame | 256 GB | 256 GB |
| Display | 7.6" folding OLED (1878×2670) + 5.4" outer OLED (1398×2034), ProMotion | 6.9" Super Retina XDR OLED, 2868×1320, ProMotion, always-on |
| Weight | 254 g | 249 g |
| Dimensions | 117.8×164.6×5.2 mm open; 117.8×84.1×11.3 mm closed | 163.4×78×8.75 mm |
| Ports | USB-C, MagSafe, Qi2 25W | USB-C (USB 3), MagSafe, Qi2 25W |
| Operating system | iOS 27.1 | iOS 27 |
Highlighted cells win clear more-is-better specs (memory, storage, lighter weight). Historical pricing uses approximate US CPI; clock speeds are not full real-world performance.
Why each matters
Apple’s first foldable iPhone, first dual-display iPhone, and the largest iPhone display at launch.
Longest iPhone battery life at launch, rated for up to 45 hours of video playback.
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Last updated: 2026-09-11