Written by Bob
Edited on
11 September 2026
·
13:29
comparison: Apple iPhone Duo vs 18 Pro
Apple has released new devices, including their first foldable device: the iPhone Duo. The biggest difference between the iPhone Duo and the iPhone 18 Pro models is that only the iPhone Duo is foldable. But there are more differences. For example, only the iPhone 818 pro has a telephoto lens and Face ID, and the iPhone Duo doesn't. They do have the same fast processor. We'll explain what you'll notice of this.
Compare the iPhone Duo with the 18 Pro and 18 Pro Max
- iPhone Duo
Open your iPhone and comfortably watch videos on the large screen.
Folded, the small device easily fits in your pocket.
Use the most demanding apps and games.
A full battery lasts about 24 hours.
When you zoom in, photos quickly beome blurry.
From
2.339,-
- iPhone 18 Pro
You can easily control this small device with 1 hand.
On the small screen, you see less details in movies and games.
Use the most demanding apps and games.
A full battery lasts about 24 hours.
Zoom in up to 8 times and take wide-angle photos.
From
1.479,-
- iPhone 18 Pro Max
On the large screen, you can see every detail of videos.
You can't control this large device with 1 hand.
Use the most demanding apps and games.
A full battery lasts about 30 hours.
Zoom in up to 8 times and take wide-angle photos.
From
1.629,-
Apple iPhone Duo vs 18 pro vs 18 Pro Max
| iPhone Duo | iPhone 18 Pro | iPhone 18 Pro Max | |
|---|---|---|---|
| Size | Small (5.4 inches) and large (7.6 inches) | Small (6.3 inches) | Large (6.9 inches) |
| Battery | 24 hours | 24 hours | 30 hours |
| Camera | Standard lens and wide-angle lens | Standard lens, wide-angle lens, and telephoto lens | Standard lens, wide-angle lens, and telephoto lens |
| Variable aperture | No | Yes | Yes |
| Processor | A20 Pro chip | A20 Pro chip | A20 Pro chip |
| Unlock via | Touch ID | Face ID | Face ID |
Foldable and size
iPhone DuoL innovative, foldable design
The most important reason to get the iPhone Duo is the foldable design. This means you don't have to choose between a large screen for videos or a small device that easily fits in your pocket. With the iPhone Duo, you have the advantages of both options. Opened, the 7.6-inch screen is much larger than that of the 18 Pro Max and you can see all details of your favorite series or movie. Close the iPhone Duo and the small 5.4-inch device will easily fit in your bag.
iPhone 18 Pro/Pro Max: large or small
If you go for the Pro models, you have to choose between large and small. With an iPhone 18 Pro, you get a smaller 6.3-inch device. this one easily fits in your pocket and you can comfortably control it with 1 hand. If you like watching videos and playing games, choose the large 6.9-inch screen of the iPhone 18 Pro Max. This device doesn't fit in your pant pocket easily and is harder to control with 1 hand, though.
Camera
iPhone Duo: no telephoto lens
On the back of the iPhone Duo, there are 2 lenses of 48 megapixels: a standard lens and a wide-angle lens. With this, you can take sharp photos even in the dark. Thanks to the wide-angle lens, you can also capture large buildings, wide landscapes, and large groups. You don't have a telephoto lens, so photos become unsharp when you zoom in far.
iPhone 18 Pro: with telephoto lens and variable aperture
Choose the iPhone 18 Pro or 18 Pro Max if you're looking for the best camera. These devices have an extra telephoto lens. This keeps your photos sharp even when you zoom in 8 times. Thanks to the variable aperture, you can take well-lit photos and videos in both the dark and bright light. Thanks to the new Pro controls, you have more creative control of your photos. For example, you can easily adjust the texture, noise, and sharpness of your photos.
Speed: no difference
Speed-wise, it doesn't matter which device you choose. Both models have the fast A20 Pro chip. This means you won't have any issues with the most demanding apps. You can use all new Ai functions on both devices as well. We expect you to get updates until 2032.
Small differences
There are a few other small differences between the iPhone Duo and 18 Pro and 18 Pro Max. For example, you can unlock your iPhone 18 Pro and Pro Max with your face using Face ID. This doesn't work on the iPhone Duo. You can unlock that with your fingerprint with Touch ID via a button on the side. The battery life of the iPhone 18 Pro and iPhone Duo is about the same. The battery lasts 24 hours after 1 charge. With the iPhone 18 Pro Max, you can reach 30 hours thanks to the large battery.
Conclusion: iPhone Duo or iPhone 18 Pro?
If you're choosing between the iPhone Duo and iPhone 18 Pro, you're mostly looking at the design and size. With an iPhone Duo, you get both a small device and a large screen. With an iPhone 18 Pro and Pro max, you have to choose between small and large. For the best cameras, choose the Pro models. The iPhone Duo misses a telephoto lens and the variable aperture.
Article by Bob
Apple iPhone Expert.
