Alongside the iPhone 18 Pro and iPhone 18 Pro Max, which start at $1,199 and $1,299 respectively, there is now the iPhone Duo, Apple’s first foldable iPhone, which starts at $1,999. All three are brand new, all three feature the same A20 Pro chip, and all three sit at the top end of Apple’s lineup.
The Duo is not a Pro model, though, and Apple’s own wording makes that clear. For example, its rear camera array is branded the 48-megapixel Dual Fusion system rather than the Pro Fusion system, and the word Pro appears nowhere in its name. The $700 premium over the iPhone 18 Pro Max buys a folding 7.6-inch display, not a better camera.
All three models still share a large amount of hardware. The shared features include:
- A20 Pro chip with a 6-core CPU, 7-core GPU with Neural Accelerators, dual 16-core Neural Engine, and hardware-accelerated ray tracing
- Apple C2 modem (except on the Pro Max in the United States), N1 wireless networking chip, Wi-Fi 7, Bluetooth 6, Thread, and the second-generation Ultra Wideband chip
- Super Retina XDR OLED displays with ProMotion up to 120Hz, Always-On display, Dynamic Island, and 3000 nits of peak outdoor brightness
- Ceramic Shield 2 front with 3x better scratch resistance, Ceramic Shield back, and IP68 water resistance to a depth of 6 meters
- Camera Control, a 48MP Fusion Ultra Wide camera at 13mm and f/2.2, Photographic Styles 3, Dual Capture, smart focus tracking, and 48MP macro photography
- Apple Intelligence and Siri AI in iOS 27
- Emergency SOS, Crash Detection, Roadside Assistance, Messages, and Find My via satellite
- USB-C with USB 3 speeds, MagSafe and Qi2 wireless charging up to 25W, and dual eSIM
- 256GB, 512GB, 1TB, and 2TB storage options
The comparison below outlines every difference between the Pro models and the Duo:
Display
| iPhone 18 Pro and iPhone 18 Pro Max | iPhone Duo |
|---|---|
| iPhone 18 Pro: 6.3-inch display iPhone 18 Pro Max: 6.9-inch display |
7.6-inch inner folding display and 5.4-inch outer display |
| iPhone 18 Pro: 2622-by-1206 resolution at 460 ppi iPhone 18 Pro Max: 2868-by-1320 resolution at 460 ppi |
Outer display: 1398-by-2034 at 460 ppi Inner display: 1878-by-2670 at 430 ppi |
| Nano-texture finish and wide-angle OLEDs on the inner display | |
| Supports Apple Pencil with USB-C |
Design and Build
| iPhone 18 Pro and iPhone 18 Pro Max | iPhone Duo |
|---|---|
| Aluminum unibody | Polished titanium frame with a 3D-printed hinge cover |
| Action button | |
| Face ID enabled by TrueDepth technology | Touch ID in the side button |
| Dual ambient light sensors | Four ambient light sensors |
| Compatible with MagSafe cases, wallets, and wireless chargers | Compatible with MagSafe cases and wireless chargers |
| Black, Silver, Glacier, and Burgundy options | Night Sky and Star White options |
| Made with 40% recycled content, including 85% recycled aluminum in the enclosure, 100% recycled rare earth elements in all magnets, 80% recycled steel in the battery enclosure and vapor chamber chassis, and 100% recycled tungsten in the Taptic Engine | Made with 35% recycled content, including 100% recycled aluminum in the internal structural frame, 85% recycled titanium in the enclosure, and 100% recycled titanium in the 3D-printed hinge cover |
| 50% of manufacturing electricity sourced from renewable electricity | 60% of manufacturing electricity sourced from renewable electricity |
Dimensions and Weight
| iPhone 18 Pro | iPhone 18 Pro Max | iPhone Duo | |
|---|---|---|---|
| Height | 5.91 inches (150.0 mm) | 6.43 inches (163.4 mm) | 4.64 inches (117.8 mm) closed 4.64 inches (117.8 mm) open |
| Width | 2.83 inches (71.9 mm) | 3.07 inches (78.0 mm) | 3.31 inches (84.1 mm) closed 6.48 inches (164.6 mm) open |
| Depth | 0.34 inch (8.75 mm) | 0.34 inch (8.75 mm) | 0.44 inch (11.3 mm) closed 0.21 inch (5.2 mm) open |
| Weight | 7.44 ounces (211 grams) | 8.78 ounces (249 grams) | 8.96 ounces (254 grams) |
Rear Cameras
| iPhone 18 Pro and iPhone 18 Pro Max | iPhone Duo |
|---|---|
| 48MP Pro Fusion camera system | 48MP Dual Fusion camera system |
| 48MP Fusion Main camera: 24mm, second-generation sensor-shift OIS, 100% Focus Pixels | 48MP Fusion Main camera: 26mm, sensor-shift OIS, Hybrid Focus Pixels |
| Variable aperture on Main camera: f/1.48, f/1.8, f/2.8, and f/4.0 | Fixed f/1.6 aperture on Main camera |
| 12MP optical-quality 2x “telephoto” sensor crop at 48mm from the Main camera | 12MP optical-quality 2x “telephoto” sensor crop at 52mm from the Main camera |
| 48MP Fusion Telephoto camera: 100mm (4x), f/2.8, tetraprism, 3D sensor-shift OIS and autofocus | |
| 12MP optical-quality 8x Telephoto sensor crop at 200mm, f/2.8, from the Fusion Telephoto camera | |
| LiDAR scanner | |
| 0.5x, 1x, 2x, 4x, and 8x optical zoom options | 0.5x, 1x, and 2x optical zoom options |
| 8x optical-quality zoom in, 2x optical zoom out, for a 16x optical-quality zoom range | 2x optical-quality zoom in, 2x optical zoom out, for a 4x optical-quality zoom range |
| Digital zoom up to 40x for photos and up to 24x for video | Digital zoom up to 10x for photos and up to 6x for video |
| Adaptive True Tone flash | True Tone flash |
| Four studio-quality mics | |
| Smart Take and Duo Preview |
Pro Capture Features and Formats
| iPhone 18 Pro and iPhone 18 Pro Max | iPhone Duo |
|---|---|
| Pro controls for lens aperture, shutter speed, white balance, and viewing histogram | |
| ProRAW | |
| Apple Reference Image (Fusion Main camera only) | |
| Spatial photos | |
| Spatial video recording at 1080p at 30 fps | |
| ProRes video recording up to 4K at 120 fps with external recording | |
| ProRes RAW video recording | |
| Apple Log 2 | |
| Academy Color Encoding System (ACES) | |
| Genlock | |
| Image formats captured: HEIF, JPEG, and DNG | Image formats captured: HEIF and JPEG |
| Video formats recorded: HEVC, H.264, ProRes, and ProRes RAW | Video formats recorded: HEVC and H.264 |
| Video playback formats include HEVC, H.264, AV1, and ProRes | Video playback formats include HEVC, H.264, and AV1 |
Front Cameras
| iPhone 18 Pro and iPhone 18 Pro Max | iPhone Duo |
|---|---|
| 18MP Center Stage front camera, f/1.9 | 12MP Center Stage outer camera, f/2.2 |
| Autofocus with Focus Pixels on the front camera | |
| Front camera Pro controls, ProRAW, ProRes, ProRes RAW, Apple Log 2, and Academy Color Encoding System | |
| Kid Cue on the front camera | |
| Under-display FaceTime camera on the inner display, f/1.8, limited to 1080p video at 30 or 60 fps with no Night mode, portraits, or Photographic Styles | |
| Duo FaceTime | |
| Optical zoom with the rear camera in FaceTime | Zoom with the rear camera in FaceTime |
Battery and Charging
| iPhone 18 Pro and iPhone 18 Pro Max | iPhone Duo |
|---|---|
| Built-in rechargeable battery | Dual built-in rechargeable batteries |
| iPhone 18 Pro: Up to 24 hours typical use iPhone 18 Pro Max: Up to 30 hours typical use |
Up to 24 hours typical use |
| iPhone 18 Pro: Up to 36 hours video playback iPhone 18 Pro Max: Up to 45 hours video playback |
Up to 44 hours using the outer display, up to 31 hours using the inner display |
| iPhone 18 Pro: Up to 33 hours streamed video playback iPhone 18 Pro Max: Up to 40 hours streamed video playback |
Up to 37 hours streamed using the outer display, up to 26 hours using the inner display |
| 50% charge in around 15 minutes | 50% charge in around 20 minutes |
Price
| iPhone 18 Pro | iPhone 18 Pro Max | iPhone Duo | |
|---|---|---|---|
| 256GB | $1,199 | $1,299 | $1,999 |
| 512GB | $1,399 | $1,499 | $2,199 |
| 1TB | $1,799 | $1,899 | $2,599 |
| 2TB | $2,399 | $2,499 | $3,199 |
For most buyers, the iPhone 18 Pro or iPhone 18 Pro Max is the better choice. They offer the same A20 Pro chip as the Duo, a more versatile camera system, and a lower price. Choose the Pro if you prefer a smaller, lighter phone, or pay $100 more for the Pro Max if you want a larger screen and longer battery life.
The camera system is the clearest reason to choose an iPhone 18 Pro over the iPhone Duo. Alongside a more advanced Main camera, the Pro models offer a variable aperture for greater control over depth of field and a dedicated Telephoto camera for subjects you cannot get close to. These advantages matter even if you never use professional capture formats: The Pro gives you more flexibility both when framing a shot and when controlling how it looks. If photography or videography is a priority, choose the iPhone 18 Pro. Buyers who also use ProRAW, ProRes, or manual controls have even more reason to do so.
The iPhone Duo is worth considering if you frequently wish your phone had a larger screen for reading, documents, taking notes, or watching video. Its 7.6-inch folding display and Apple Pencil support are unique in the iPhone lineup and could reduce the need to carry a separate tablet. If you would unfold it several times a day for those sorts of tasks, the benefit may outweigh the camera compromises and higher price. If most of your use involves messaging, social media, and taking photos, there is less reason to pay extra for the iPhone Duo.
The compromises also extend beyond the rear cameras. Both of its front-facing cameras are also inferior. The iPhone Duo also replaces Face ID with Touch ID and drops the Action button, so buyers will need to adjust. It also lacks the Pro models’ LiDAR Scanner, adaptive True Tone flash, four studio-quality microphones, and spatial photo and video recording.
You also need to be comfortable with the Duo when it is closed. Despite its smaller outer screen, it is wider and thicker than either Pro model and slightly heavier than the Pro Max. Battery life is another reason to favor the Pro Max: The Duo matches the smaller Pro’s rated typical-use battery life, and using its inner display reduces its video playback time substantially.
The price gap remains significant at every storage tier. A 1TB iPhone 18 Pro Max is only $100 cheaper than the entry-level iPhone Duo, but that Duo has just 256GB of storage. At the same capacity, you pay $700 more than the Pro Max or $800 more than the Pro. That premium needs to be justified by how much you would use the folding screen and how much you care about some of the device’s compromises.
Buy the Duo if you have a clear idea of the things you would regularly unfold it to do, or if experiencing Apple’s first foldable and a radically new kind of iPhone is itself worth the premium to you. If you are unsure how the larger screen would fit into your routine, the Pro models remain the stronger purchase with their traditional “slab” form factor and host of superior specifications.
The iPhone 18 Pro and iPhone 18 Pro Max are available to pre-order now. iPhone Duo pre-orders open on October 16 ahead of an October 23 release.
This article, “iPhone 18 Pro vs. iPhone Duo Buyer’s Guide: Which Should You Choose?” first appeared on MacRumors.com
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