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Marques Brownlee's Apple iPhone Duo Review

Apple · Reviewed by Marques Brownlee · Published 2026-09-10

Rating 4.5/5Source quality 85/100Evidence 15Claims 10Q&A 7Pros 8Cons 4

Based on a review by Marques Brownlee (accessed 2026-09-10).

What they actually found

  • Loved — Seamless and exceptionally fast animation between inner and outer displays
  • Annoyed by — Slightly thicker than a standard iPhone

Based on this review alone: buy it if you care about seamless and exceptionally fast animation between inner and outer displays — just accept slightly thicker than a standard iphone.

This source's evidence 🎬

Source verdict

The reviewer concludes that the iPhone Duo, while functionally very similar to the Samsung Galaxy Z Fold 8, offers "tiny, frankly unnecessary, but also very awesome quality-of-life things" and a superior "fit and finish" with neat animations that make it feel like a "more fun phone to use." He states that the iPhone "kind of mogs the Samsung."

About this source

The video provides first impressions and a hands-on look at the new iPhone 18 Pro, Pro Max, and the new folding iPhone Duo. It covers design aspects, new features like the A20 Pro chip, variable aperture camera, and a smaller Dynamic Island on the Pro models, while primarily focusing on the iPhone Duo's form factor, display, software, and comparison with the Samsung Galaxy Z Fold 8.

Review notes

The Apple iPhone Duo stands out as a highly polished foldable, offering a more enjoyable and refined user experience compared to its immediate competitor, the Samsung Galaxy Z Fold 8. The device features exceptionally fast and seamless animations when transitioning between its inner and outer displays, eliminating the typical delay seen in other foldables. Its interior display utilizes a nano-texture matte coating which effectively hides the crease visually and provides a smooth tactile feel under the finger. However, the front 5.4-inch display is quite small, and the device foregoes Face ID in favor of a power button-integrated Touch ID sensor. If you prioritize a premium, fluid user experience with a nearly invisible crease in a foldable form factor, this phone is worth considering. If you need the largest possible external display or require Face ID biometric security, you might want to explore other options.

What the reviewer liked

  • Seamless and exceptionally fast animation between inner and outer displays
  • Nano-texture matte coating on interior display effectively hides the crease visually
  • Matte coating makes the interior display smooth to the touch for gliding fingers
  • Minimal crease, comparable to industry leaders like the Oppo Find N6
  • Effectively reduces reflections on the interior display in bright environments
  • Hidden selfie camera on the interior display maintains a corner-to-corner seamless look
  • Titanium frame with rounded rails for improved grip when opening
  • Overall superior fit, finish, and quality-of-life features compared to competitors

What the reviewer criticised

  • Slightly thicker than a standard iPhone
  • No Face ID; relies on a Touch ID fingerprint reader on the power button
  • Front 5.4-inch display is noted as being "kind of on the small side"
  • Dual cameras assumed to be on the smaller side compared to flagship phones

Structured claims

The iPhone 18 Pro models feature a new A20 Pro chip, manufactured on a 2nm process with 50% more memory bandwidth, though real-world performance gains require further testing.

reviewer_claimlimited

Apple claims the iPhone 18 Pro will match the 17 Pro Max's battery life, and the 18 Pro Max will have the best battery life ever in an iPhone.

specification_claimlimited

The main camera on the iPhone 18 Pro features a new variable aperture lens with four stops for manual control, a significant upgrade from past implementations.

specification_claimlimited

The Dynamic Island on the iPhone 18 Pro is 25% smaller due to the Face ID camera being moved behind the display, allowing for more Live Activities.

specification_claimmoderate

The iPhone Duo is a passport-shaped, book-style foldable with a 5.4-inch external display and a 7.6-inch internal display, essentially an iPhone when closed and an iPad mini when open.

reviewer_claimstrong

The iPhone Duo replaces Face ID with a Touch ID fingerprint reader integrated into the power button on the right-hand rail.

reviewer_claimmoderate

The iPhone Duo's internal display has a nano-texture matte coating and a stiff hinge design that effectively hides the crease, making it one of the least noticeable creases on a folding phone.

reviewer_claimstrong

The iPhone Duo features exceptionally smooth and quick animations, especially when switching between the inner and outer displays, enhancing the overall user experience.

reviewer_claimstrong

The iPhone Duo boasts an IP68 water and dust resistance rating, allowing it to be submerged in water, which is a promising durability feature for a foldable.

specification_claimmoderate

A notable design downside of the iPhone Duo is the asymmetrical cover screen display, which is rounded on the right and squared on the left.

reviewer_claimmoderate

Evidence items

A20 Pro chip specifications

specification_claimneutralt=0:48–0:51

There's a new A20 Pro chip in the iPhone 18 Pro models, which is a 2 nanometer chip and has 50% more memory bandwidth.

Battery life boost claims for iPhone 18 Pro models

specification_claimneutralt=1:02–1:07

Apple is claiming the new 18 Pro will have the same battery life as the 17 Pro Max, and the new 18 Pro Max will have the best battery life ever in an iPhone.

New variable aperture main camera lens

specification_claimneutralt=1:13–1:37

There's also a new variable aperture lens on the main camera of the iPhone 18 Pro, which can stop down with manual control, offering four stops that can be cycled through on demand.

Dynamic Island size reduction

specification_claimneutralt=1:45–1:47

The Dynamic Island at the top of the iPhone 18 Pro is 25% smaller because the Face ID infrared camera was moved behind the display.

iPhone 18 Pro and Pro Max starting prices

specification_claimneutralt=2:27–2:32

The new iPhone 18 Pro phones start at $1,199, and the new Pro Maxes start at $1,299, which is $100 more than last year's models.

iPhone Duo physical dimensions and displays

visual_inspectionneutralt=3:23–3:28

The iPhone Duo is a passport-shaped, book-style foldable with a 5.4-inch display on the front and a 7.6-inch display when opened.

iPhone Duo Touch ID on power button

hands_on_demoneutralt=3:55–3:58

The iPhone Duo lacks Face ID; instead, the power button on the right-hand rail functions as a Touch ID fingerprint reader.

iPhone Duo crease hiding and visibility

visual_inspectionpositivet=4:54–5:05

The iPhone Duo's nano-texture matte coating on the display effectively cuts down reflections and does a great job hiding the crease, which is already pretty minimal, similar to the Oppo Find N6.

iPhone Duo smooth screen transition animations

hands_on_demopositivet=5:48–6:05

The iPhone Duo features a 'sweet animation' for transitioning between the inner and outer displays, which is very smooth and quick, opening exceptionally fast every time.

iPhone Duo functional similarity to Samsung Galaxy Z Fold 8

comparisonneutralt=7:00–7:08

Functionally, the iPhone Duo and the Samsung Galaxy Z Fold 8 are very similar, both having dual cameras, flagship chips, solid battery life, and a fingerprint reader on the power button.

iPhone Duo's superior 'quality-of-life' features

comparisonpositivet=7:10–7:19

The iPhone Duo possesses numerous 'tiny, frankly unnecessary, but also very awesome quality-of-life things' that make it feel like a more fun phone to use compared to the Samsung Galaxy Z Fold 8, including its fit and finish and animations.

iPhone Duo interior display coating and feel

hands_on_demopositivet=7:50–7:56

The interior display's coating on the iPhone Duo blocks reflections extremely well, aiding in hiding the crease visually, and it feels smooth to the touch, allowing a finger to glide over it easily.

iPhone Duo IP68 water and dust resistance

specification_claimpositivet=8:36–8:41

The iPhone Duo is IP68 water and dust resistance rated, meaning it can theoretically be submerged and should be fine with water poured on it, a feature shared with few other foldables like the Pixel 10 Pro Fold.

iPhone Duo half-open mode usability

hands_on_demopositivet=8:45–8:56

The iPhone Duo's hinge allows it to be used half-open, with many apps being responsive to this mode, and it can even be locked in tent mode to display a clock or alarm.

iPhone Duo cover screen asymmetry

visual_inspectionnegativet=9:19–9:24

The most obvious visual downside of the iPhone Duo is its asymmetrical cover screen display, which is rounded on the right and squared on the left.

Quick answers

  • What are the key new features of the iPhone 18 Pro? The iPhone 18 Pro models incorporate an A20 Pro chip, which is a 2nm processor with 50% more memory bandwidth.
  • How much does the iPhone 18 Pro and Pro Max cost? The new iPhone 18 Pro models are priced higher than their predecessors, with the iPhone 18 Pro starting at $1,199 and the iPhone 18 Pro Max starting at $1,299.
  • What is the form factor and display size of the iPhone Duo? The iPhone Duo features a book-style folding design that is passport-shaped when closed.
  • Does the iPhone Duo have a noticeable screen crease? The reviewer found the iPhone Duo's crease to be "pretty minimal" and comparable to the Oppo Find N6, one of the least noticeable on a folding phone.

Buyer questions answered

What are the key new features of the iPhone 18 Pro?

The iPhone 18 Pro models incorporate an A20 Pro chip, which is a 2nm processor with 50% more memory bandwidth. Their main camera now includes a variable aperture lens with four manual stops, and the Dynamic Island is 25% smaller due to the Face ID camera being relocated behind the display.

How much does the iPhone 18 Pro and Pro Max cost?

The new iPhone 18 Pro models are priced higher than their predecessors, with the iPhone 18 Pro starting at $1,199 and the iPhone 18 Pro Max starting at $1,299. This marks a $100 price increase compared to last year's models.

What is the form factor and display size of the iPhone Duo?

The iPhone Duo features a book-style folding design that is passport-shaped when closed. It has a 5.4-inch display on the front cover and opens up to reveal a larger 7.6-inch internal display, designed to function like an iPhone when closed and an iPad mini when open.

Does the iPhone Duo have a noticeable screen crease?

The reviewer found the iPhone Duo's crease to be "pretty minimal" and comparable to the Oppo Find N6, one of the least noticeable on a folding phone. The nano-texture matte coating on the internal display does a great job of cutting down reflections, which visually hides the crease, and the hinge design with carbon-fiber support plates also contributes to its stiffness.

How does the iPhone Duo compare to the Samsung Galaxy Z Fold 8?

Functionally, the iPhone Duo and Samsung Galaxy Z Fold 8 are described as "very similar," sharing features like dual cameras, flagship chips, solid battery life, and power button fingerprint readers. However, the reviewer feels the iPhone Duo provides numerous "tiny, frankly unnecessary, but also very awesome quality-of-life things" and a better "fit and finish," including smoother animations and a more refined overall feel, making it a "more fun phone to use" that "kind of mogs the Samsung."

Is the iPhone Duo water and dust resistant?

The iPhone Duo is rated IP68 for water and dust resistance, a significant durability feature. This means it can theoretically be submerged in water and should be fine if water is poured on it, making it one of the few foldables with this level of protection.

What is a notable design flaw of the iPhone Duo?

The reviewer points out that the most obvious visual downside of the iPhone Duo is the asymmetry of its cover screen. The display is rounded on the right side and squared on the left, creating a visually unbalanced look, though this does not significantly affect functionality.

Specs mentioned in this review

A20 Pro chip specifications
There's a new A20 Pro chip in the iPhone 18 Pro models, which is a 2 nanometer chip and has 50% more memory bandwidth
Battery life boost claims for iPhone 18 Pro models
Apple is claiming the new 18 Pro will have the same battery life as the 17 Pro Max, and the new 18 Pro Max will have the best battery life ever in an iPhone
New variable aperture main camera lens
There's also a new variable aperture lens on the main camera of the iPhone 18 Pro, which can stop down with manual control, offering four stops that can be cycled through on demand
Dynamic Island size reduction
The Dynamic Island at the top of the iPhone 18 Pro is 25% smaller because the Face ID infrared camera was moved behind the display
iPhone 18 Pro and Pro Max starting prices
The new iPhone 18 Pro phones start at $1,199, and the new Pro Maxes start at $1,299, which is $100 more than last year's models
iPhone Duo IP68 water and dust resistance
The iPhone Duo is IP68 water and dust resistance rated, meaning it can theoretically be submerged and should be fine with water poured on it, a feature shared with few other foldables like the Pixel 10 Pro Fold

Not covered in depth by this source

  • Not covered: Stability
  • Not covered: Traction
  • Not covered: Weight
  • Not covered: Breathability

Why this source is included

85/100 source quality

  • • Independent of the brand
  • ✓ Hands-on demonstration
  • ✓ Specific testing or measurements
  • ✓ Clear sponsorship / relationship disclosure

Transcript summary

Marques Brownlee shares his initial impressions of Apple's latest iPhones, including the iPhone 18 Pro, Pro Max, and the debut folding iPhone Duo. He notes the 18 Pro models retain a similar design but feature an A20 Pro chip, variable camera aperture, and a reduced Dynamic Island. The review primarily focuses on the iPhone Duo, highlighting its passport-shaped book-style foldable design, 5.4-inch external and 7.6-inch internal displays, Touch ID, and iOS-like software experience. Brownlee praises the Duo's minimal crease, anti-glare display coating, and smooth animations, suggesting it offers a more refined user experience compared to the Samsung Galaxy Z Fold 8. He also mentions its IP68 rating and support for half-open modes.

Full transcript is not redistributed here to respect the original creator’s rights.

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About this page

This page converts Marques Brownlee's review of the Apple iPhone Duo into structured evidence — timestamped claims, pros & cons, and buyer questions. It is not the original review and does not replace watching or reading the full source.

Sponsorship & disclosure

Brand relationship disclosed as: affiliate

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