Apple iPhone 18 Pro Max vs Apple iPhone Duo
The Apple iPhone 18 Pro Max comes out ahead on 5 counts and the Apple iPhone Duo on 2.
Which should you buy?
Pick the Apple iPhone 18 Pro Max for
- Bigger battery: 5,391 vs 4,883 mAh (10% more)
- Lighter: 249 g vs 254 g (5 g less)
- Thinner folded: 8.8 mm vs 11.3 mm
- Optical zoom (4×), which the other lacks
- Cheaper at launch: $1,299 vs $1,999
Pick the Apple iPhone Duo for
- Bigger main screen: 7.6" vs 6.9"
- More compact folded: 45.6 mm shorter
Size comparison
Folded, the Apple iPhone 18 Pro Max is 45.6 mm taller, 6.1 mm narrower, 2.6 mm thinner and 5 g lighter than the Apple iPhone Duo. Its main screen is 0.7" smaller. Unfolded, the Apple iPhone Duo opens to 117.8 × 164.6 mm and 5.2 mm thick.
- Apple iPhone 18 Pro Max163.4 × 78 × 8.75 mm
- Apple iPhone Duo117.8 × 84.1 × 11.3 mm folded
Specs side by side
| Launch | Apple iPhone 18 Pro Max | Apple iPhone Duo |
|---|---|---|
| Announced | September 9, 2026 | September 9, 20261 |
| Released | September 18, 2026 | October 23, 2026 |
| Launch price | $1,299 (better) | $1,9991 |
| Body | Apple iPhone 18 Pro Max | Apple iPhone Duo |
|---|---|---|
| Size | 163.4 × 78 × 8.8 mm | 117.8 × 84.1 × 11.3 mm folded |
| Unfolded size | — | 117.8 × 164.6 × 5.2 mm |
| Thickness | 8.8 mm (better) | 11.3 mm folded, 5.2 mm open |
| Weight | 249 g (better) | 254 g |
| Frame | Aluminum unibody | Titanium |
| Back | Ceramic Shield | Ceramic Shield |
| Water resistance | IP68 | IP68 |
| Colours | Black, Silver, Glacier, Burgundy | Night Sky, Star White |
| Display | Apple iPhone 18 Pro Max | Apple iPhone Duo |
|---|---|---|
| Size | 6.9" | 7.6" |
| Cover screen | — | 5.4" |
| Type | Super Retina XDR OLED | OLED |
| Resolution | 1320 × 2868 | 1878 × 2670 (better) |
| Refresh rate | 120 Hz | 120 Hz |
| Peak brightness | 3,000 nits | 3,000 nits |
| Protection | Ceramic Shield 2 | Ceramic Shield 2 |
| Performance and software | Apple iPhone 18 Pro Max | Apple iPhone Duo |
|---|---|---|
| Chipset | A20 Pro | A20 Pro |
| CPU | 6-core CPU with 2 super cores and 4 efficiency cores | 6-core (2 super cores, 4 efficiency cores) |
| Process | 2 nm | 2 nm1 |
| Ships with | iOS 27 | iOS 27 |
| Memory | Apple iPhone 18 Pro Max | Apple iPhone Duo |
|---|---|---|
| RAM | 12 GB | 12 GB1 |
| Storage | 256 GB / 512 GB / 1 TB / 2 TB | 256 GB / 512 GB / 1 TB / 2 TB |
| Card slot | — | No1 |
| Cameras | Apple iPhone 18 Pro Max | Apple iPhone Duo |
|---|---|---|
| Rear | 48 MP Main, OIS 48 MP Ultrawide 48 MP Telephoto (4× optical), OIS | 48 MP Main, OIS 48 MP Ultrawide |
| Main camera | 48 MP | 48 MP |
| Optical zoom | 4× (better) | None |
| Front | 18 MP | 12 MP |
| Video | 4K Dolby Vision at 120 fps | 4K Dolby Vision at 120 fps (Fusion Main) |
| Battery | Apple iPhone 18 Pro Max | Apple iPhone Duo |
|---|---|---|
| Capacity | 5,391 mAh1 (better) | 4,883 mAh1 |
| Wired charging | 60 W1 | — |
| Wireless charging | 25 W | 25 W |
| Connectivity | Apple iPhone 18 Pro Max | Apple iPhone Duo |
|---|---|---|
| 5G | Yes | Yes |
| Wi-Fi | Wi-Fi 7 (802.11be) | Wi-Fi 7 (802.11be) |
| Bluetooth | Bluetooth 6 | 6 |
| NFC | Yes | Yes |
| USB | USB-C with USB 3 (up to 10Gb/s) | USB-C with DisplayPort, USB 3 (up to 10Gb/s) |
| eSIM | Yes | Yes |
| Satellite messaging | Yes | Yes |
| Features | Apple iPhone 18 Pro Max | Apple iPhone Duo |
|---|---|---|
| Fingerprint | — | Side button (Touch ID) |
| Stereo speakers | Yes1 | Yes1 |
| Stylus | — | Yes1 |
Highlighted: the better value where one is clearly better. Sources for each phone are listed on the Apple iPhone 18 Pro Max and Apple iPhone Duo pages.
Quick answers
- Is the Apple iPhone 18 Pro Max bigger than the Apple iPhone Duo?
- Folded, the Apple iPhone 18 Pro Max is 45.6 mm taller, 6.1 mm narrower, 2.6 mm thinner and 5 g lighter than the Apple iPhone Duo. Its main screen is 0.7" smaller. Unfolded, the Apple iPhone Duo opens to 117.8 × 164.6 mm and 5.2 mm thick.
- Which has the bigger battery, the Apple iPhone 18 Pro Max or the Apple iPhone Duo?
- The Apple iPhone 18 Pro Max has the bigger battery: 5,391 mAh against 4,883 mAh. Real battery life also depends on the chip and screen.
- Which was cheaper at launch?
- The Apple iPhone 18 Pro Max launched at $1,299, against $1,999 for the Apple iPhone Duo (US launch prices; street prices drop over time).