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Smartphone comparison

iPhone 18 Pro Max vs iPhone Duo

Compare cameras, battery, screen and everyday features.

Compared products
01Selected
iPhone 18 Pro Max 512GB

iPhone 18 Pro Max 512GB

  • 249 g.
  • About 6.9 inch screen.
  • Apple A20 Pro (2 nm) processor.
  • 12 GB RAM in this version.
  • 512 GB storage in this version.
KSh 248,500In Stock
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02
iPhone Duo 256GB

iPhone Duo 256GB

  • 254 g.
  • About 7.6 inch screen.
  • Apple A20 Pro (2 nm) processor.
  • 12 GB RAM in this version.
  • 256 GB storage in this version.
KSh 400,000In Stock
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2 spaces available

iPhone 18 Pro 512GBKSh 223,500
iPhone 17 Pro MaxKSh 162,000
Samsung Galaxy Z Fold 8 Ultra 512GBKSh 227,000
Vivo X300 UltraKSh 200,000
Google Pixel 11 Pro XL 512GBKSh 166,000
Google Pixel 11 Pro Fold 512GBKSh 270,000
Oppo Find N6KSh 223,000
2 of 4 products

Our quick verdict

With the same Apple A20 Pro processor, 12 GB of RAM and IP68 rating, the iPhone 18 Pro Max has optical zoom, sharper selfies (18 MP) and more storage (512 GB), while the iPhone Duo has a larger 7.6-inch screen, an anti-glare screen and a premium titanium build with a glass back and is slimmer.

Weight

iPhone 18 Pro Max
249 g
iPhone Duo
254 g

Display

iPhone 18 Pro Max
About 6.9 inch screen
iPhone Duo
About 7.6 inch screen

Performance

iPhone 18 Pro Max
Hexa-core (2x4.93 GHz + 4x2.64 GHz) processor
iPhone Duo
Hexa-core processor

Storage

iPhone 18 Pro Max
512 GB storage in this version
iPhone Duo
256 GB storage in this version

Battery capacity

iPhone 18 Pro Max
Market-dependent versions:
iPhone Duo
Li-Ion

Key differences

The main differences to help you choose.

iPhone 18 Pro Max

  • Telephoto camera with 4x optical zoom.
  • More storage: 512 GB (vs 256 GB).
  • Higher-resolution selfie camera: 18 MP (vs 12 MP).
  • 4.5 W reverse charging for earbuds or another phone.

iPhone Duo

  • Larger 7.6-inch screen (vs 6.9-inch).
  • Titanium frame and glass back (vs aluminium frame).
  • Anti-glare screen.
  • Slimmer: 5.2 mm thick (vs 8.8 mm).
  • Stylus support.

What matters most to you?

Choose any priorities

How each product answers the questions buyers ask most. Tick a topic to add it, untick one to hide it.

More topicsFewer topics
6 priorities selected.
How each product answers the selected priorities
PriorityiPhone 18 Pro MaxiPhone Duo
Display6.9-inch OLED display, 120 Hz, 460 ppi7.6-inch OLED display, 120 Hz, 430 ppi
Camera48 MP main camera with OIS, plus a 4x telephoto camera48 MP main camera with OIS
Storage512 GB storage256 GB storage
Battery capacityMarket-dependent versions:Li-Ion
ChargingWired, PD3.2, AVS, 50% in 15 minWired, PD3.2, AVS, 50% in 20 min
Weight249 g254 g

Detailed comparison

Explore the full specifications, section by section.

General

General specifications comparison
SpecificationiPhone 18 Pro Max 512GBiPhone Duo 256GB
BrandAppleApple
ModelApple iPhone 18 Pro MaxApple iPhone Duo
Announced2026, September 092026, September 09
Device type / form familySmartphoneFoldable smartphone
Release statusAvailable. Released 2026, September 18Coming soon. Exp. release 2026, October 23
Model numbersA3717, A3473, A3716, A3718A3720, A3721, A3447, A3719
Performance benchmarksAnTuTu: 3463072 (v11); GeekBench: 12794 (v6), 11558 (v7); 3DMark: 7931 (Wild Life Extreme)—
Measured display brightness969 nits max brightness (measured)—
Measured loudspeaker loudness-25.0 LUFS (Very good)—
Battery testActive use score 19:20h—
EU label energyClass A—
EU label battery62:00h endurance, 1000 cycles—
EU label free fallClass B (180 falls)—
EU label repairabilityClass C—
Specification status—Coming soon, with expected release on 23 October 2026. Battery capacity, CPU clock speeds and inner camera megapixel count remain pending confirmation; source specifications may change before release.

Design

Design specifications comparison
SpecificationiPhone 18 Pro Max 512GBiPhone Duo 256GB
Dimensions163.4 x 78 x 8.8 mm (6.43 x 3.07 x 0.35 in)Unfolded: 117.8 x 164.6 x 5.2 mm; Folded: 117.8 x 84.1 x 11.3 mm
Weight249 g (8.78 oz)254 g (8.96 oz)
Build materialsGlass front (Ceramic Shield 2), aluminum frame, aluminum back/ glass back (Ceramic Shield)Glass front (Ceramic Shield 2) (folded), titanium frame & hindge (grade 5), glass back (Ceramic Shield)
Dimensions unfolded—117.8 x 164.6 x 5.2 mm
Dimensions folded—117.8 x 84.1 x 11.3 mm
Stylus support—Stylus support

Display

Display specifications comparison
SpecificationiPhone 18 Pro Max 512GBiPhone Duo 256GB
DisplayLTPO Super Retina XDR OLED, 120Hz, HDR10, Dolby Vision, 1000 nits (typ), 1600 nits (HBM), 3000 nits (peak); 6.9 inches, 115.6 cm2 (~90.7% screen-to-body ratio)LTPO Super Retina XDR OLED, 120Hz, HDR10, Dolby Vision, 1000 nits (typ), 1600 nits (HBM), 3000 nits (peak); 7.6 inches, 175.4 cm2 (~90.4% screen-to-body ratio)
Screen resolution1320 x 2868 pixels, 19.5:9 ratio (~460 ppi density)1878 x 2670 pixels (~430 ppi density)
Display protectionCeramic Shield 2Nano Texture finish
Display featuresAnti-reflective coatingAnti‑reflective coating; Wide-angle OLED matte display; Small display crease
Display technologyLTPO Super Retina XDR OLEDLTPO Super Retina XDR OLED
Display size6.9 inches, 115.6 cm2 (~90.7% screen-to-body ratio)7.6 inches, 175.4 cm2 (~90.4% screen-to-body ratio)
Refresh rate120Hz120Hz
Brightness1000 nits (typ), 1600 nits (HBM), 3000 nits (peak)1000 nits (typ), 1600 nits (HBM), 3000 nits (peak)
HDR formatsHDR10, Dolby VisionHDR10, Dolby Vision
Pixel density~460 ppi~430 ppi
Aspect ratio19.5:9 ratio—
Screen-to-body ratio~90.7% screen-to-body ratio~90.4% screen-to-body ratio
Inner display—LTPO Super Retina XDR OLED, 120Hz, HDR10, Dolby Vision, 1000 nits (typ), 1600 nits (HBM), 3000 nits (peak); 7.6 inches, 175.4 cm2 (~90.4% screen-to-body ratio); 1878 x 2670 pixels (~430 ppi density)
Outer display—LTPO Super Retina XDR OLED, 120Hz, HDR10, Dolby Vision, 1000 nits (typ), 1600 nits (HBM), 3000 nits (peak); 5.4 inches, 1398 x 2034 pixels, 460 ppi; Ceramic Shield 2, Anti‑reflective coating

Performance

Performance specifications comparison
SpecificationiPhone 18 Pro Max 512GBiPhone Duo 256GB
ProcessorApple A20 Pro (2 nm)Apple A20 Pro (2 nm)
CPUHexa-core (2x4.93 GHz + 4x2.64 GHz)Hexa-core
GPUApple GPU (7-core graphics)Apple GPU (7-core graphics)
Process node2 nm2 nm

Memory & Storage

Memory & Storage specifications comparison
SpecificationiPhone 18 Pro Max 512GBiPhone Duo 256GB
RAM12GB12GB
Storage512GB256GB
Storage technologyNVMe—
Expandable storageNoNo
Memory configurations256GB 12GB RAM, 512GB 12GB RAM, 1TB 12GB RAM, 2TB 12GB RAM256GB 12GB RAM, 512GB 12GB RAM, 1TB 12GB RAM, 2TB 12GB RAM

Cameras

Cameras specifications comparison
SpecificationiPhone 18 Pro Max 512GBiPhone Duo 256GB
Rear camera48 MP, f/1.5-4.0, 24mm (wide), 1/1.28", 1.22µm, dual pixel PDAF, sensor-shift OIS (gen2); 48 MP, f/2.8, 100mm (periscope telephoto), 1/2.55", 0.7µm, PDAF, 3D sensor‑shift OIS, 4x optical zoom; 48 MP, f/2.2, 13mm, 120˚ (ultrawide), 1/2.55", 0.7µm, PDAF; TOF 3D LiDAR scanner (depth)48 MP, f/1.6, 26mm (wide), 1/1.56", 1.0µm, PDAF, sensor-shift OIS; 48 MP, f/2.2, 13mm, 120˚ (ultrawide), 1/2.55", 0.7µm, PDAF
Front camera18 MP multi-aspect, f/1.9, 20mm (ultrawide), PDAF; SL 3D, (depth/biometrics sensor)Under-display camera, f/1.8, 1080p@30/60fps video; Cover camera: 12 MP multi-aspect, f/2.2, (wide), AF
Rear camera featuresDual-LED dual-tone flash, HDR (photo/panorama), Cinematic from regular videoDual-LED dual-tone flash, HDR (photo/panorama)
Rear camera video4K@24/25/30/60/100/120fps, 1080p@25/30/60/120/240fps, 10-bit HDR, Dolby Vision HDR (up to 120fps), ProRes, ProRes RAW (up to 120fps), Apple Log 2, 3D (spatial) video/audio, stereo sound rec.4K@24/25/30/60/100/120fps, 1080p@25/30/60/120/240fps, 10-bit HDR, Dolby Vision HDR (up to 120fps), ProRes, 3D (spatial) video/audio, stereo sound rec.
Front camera featuresHDR, Dolby Vision HDR, 3D (spatial) audio, stereo sound rec., ProRes RAW, Apple Log 2HDR, Dolby Vision HDR, spatial audio, stereo sound rec.
Front camera video4K@24/25/30/60fps, 1080p@25/30/60/120fps, gyro-EIS4K@24/25/30/60fps, 1080p@25/30/60/120fps, gyro-EIS
Wide camera48 MP, f/1.5-4.0, 24mm (wide), 1/1.28", 1.22µm, dual pixel PDAF, sensor-shift OIS (gen2)48 MP, f/1.6, 26mm (wide), 1/1.56", 1.0µm, PDAF, sensor-shift OIS
Periscope telephoto camera48 MP, f/2.8, 100mm (periscope telephoto), 1/2.55", 0.7µm, PDAF, 3D sensor‑shift OIS, 4x optical zoom—
Ultra-wide camera48 MP, f/2.2, 13mm, 120˚ (ultrawide), 1/2.55", 0.7µm, PDAF48 MP, f/2.2, 13mm, 120˚ (ultrawide), 1/2.55", 0.7µm, PDAF
Additional rear camerasTOF 3D LiDAR scanner (depth)—
Cover camera—12 MP multi-aspect, f/2.2, (wide), AF
Under-display camera—f/1.8; 1080p@30/60fps video

Battery & Charging

Battery & Charging specifications comparison
SpecificationiPhone 18 Pro Max 512GBiPhone Duo 256GB
BatteryMarket-dependent versions:; · Li-Ion 5391 mAh - Nano SIM model; · Li-Ion 5567 mAh - eSIM only modelLi-Ion
ChargingWired, PD3.2, AVS, 50% in 15 min; 25W wireless MagSafe/Qi2, 50% in 30 min (15W - China); 4.5W reverse wiredWired, PD3.2, AVS, 50% in 20 min; 25W wireless MagSafe/Qi2, 50% in 30 min
Battery technologyLi-IonLi-Ion
Wireless charging25W wireless MagSafe/Qi2, 50% in 30 min (15W - China)25W wireless MagSafe/Qi2, 50% in 30 min
Reverse charging4.5W reverse wired—

Software

Software specifications comparison
SpecificationiPhone 18 Pro Max 512GBiPhone Duo 256GB
Operating systemiOS 27iOS 27

Network

Network specifications comparison
SpecificationiPhone 18 Pro Max 512GBiPhone Duo 256GB
NetworkGSM / HSPA / LTE / 5GGSM / HSPA / LTE / 5G
SIM· Nano-SIM + eSIM + eSIM (max 2 at a time; International); · eSIM + eSIM (8 or more, max 2 at a time; USA); · Nano-SIM + Nano-SIM + eSIM + eSIM (max 2 at a time; China)· eSIM + eSIM (8 or more, max 2 at a time) - Global; · eSIM + eSIM (China)
2G bandsGSM 850 / 900 / 1800 / 1900GSM 850 / 900 / 1800 / 1900
3G bandsHSDPA 850 / 900 / 1700(AWS) / 1900 / 2100HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
4G bands1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 30, 32, 34, 38, 39, 40, 41, 42, 48, 53, 66, 106 - A3717; 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 17, 18, 19, 20, 25, 26, 28, 29, 30, 32, 34, 38, 39, 40, 41, 42, 48, 53, 66, 71 - A3473; 1, 2, 3, 4, 5, 7, 8, 11, 12, 13, 14, 17, 18, 19, 20, 21, 25, 26, 28, 29, 30, 32, 34, 38, 39, 40, 41, 42, 48, 53, 66, 71, 106 - A3716; 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 30, 32, 34, 38, 39, 40, 41, 42, 48, 66, 106 - A37181, 2, 3, 4, 5, 7, 8, 12, 13, 14, 17, 18, 19, 20, 25, 26, 28, 29, 30, 32, 34, 38, 39, 40, 41, 42, 48, 53, 66, 71, 106 - A3447, A3719; 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 30, 32, 34, 38, 39, 40, 41, 42, 48, 53, 66, 106 - A3720; 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 30, 32, 34, 38, 39, 40, 41, 42, 48, 66, 106 - A3721
5G bands1, 2, 3, 5, 7, 8, 12, 20, 25, 26, 28, 30, 38, 40, 41, 48, 53, 66, 70, 75, 77, 78, 79 SA/NSA/Sub6 - A3717; 1, 2, 3, 5, 7, 8, 12, 14, 20, 25, 26, 28, 29, 30, 38, 40, 41, 48, 53, 66, 70, 71, 75, 77, 78, 79, 258, 260, 261 SA/NSA/Sub6/mmWave - A3473; 1, 2, 3, 5, 7, 8, 12, 14, 20, 25, 26, 28, 29, 30, 38, 40, 41, 48, 53, 66, 70, 71, 75, 77, 78, 79 SA/NSA/Sub6 - A3716; 1, 2, 3, 5, 7, 8, 12, 20, 25, 26, 28, 30, 38, 40, 41, 48, 66, 70, 75, 77, 78, 79 SA/NSA/Sub6 - A37181, 2, 3, 5, 7, 8, 12, 20, 25, 26, 28, 30, 38, 40, 41, 48, 53, 66, 70, 75, 77, 78, 79 SA/NSA/Sub6 - A3720; 1, 2, 3, 5, 7, 8, 12, 14, 20, 25, 26, 28, 29, 30, 38, 40, 41, 48, 53, 66, 70, 71, 75, 77, 78, 79, 258, 260, 261 SA/NSA/Sub6/mmWave - A3447; 1, 2, 3, 5, 7, 8, 12, 20, 25, 26, 28, 30, 38, 40, 41, 48, 66, 70, 75, 77, 78, 79 SA/NSA/Sub6 - A3721; 1, 2, 3, 5, 7, 8, 12, 14, 20, 25, 26, 28, 29, 30, 38, 40, 41, 48, 53, 66, 70, 71, 75, 77, 78, 79 SA/NSA/Sub6 - A3719
Network speedHSPA, LTE, 5GHSPA, LTE, 5G

Connectivity

Connectivity specifications comparison
SpecificationiPhone 18 Pro Max 512GBiPhone Duo 256GB
NFCYesYes
Bluetooth6.0, A2DP, LE6.0, A2DP, LE
Wi-FiWi-Fi 802.11 a/b/g/n/ac/6e/7, tri-band, hotspotWi-Fi 802.11 a/b/g/n/ac/6e/7, tri-band, hotspot
PositioningGPS (L1+L5), GLONASS, GALILEO, BDS, QZSS, NavICGPS (L1+L5), GLONASS, GALILEO, BDS, QZSS, NavIC
RadioNoNo
USBUSB Type-C 3.2 Gen 2, DisplayPortUSB Type-C 3.2 Gen 2, DisplayPort
Ultra Wideband (UWB)Ultra Wideband (UWB) support (gen2 chip)Ultra Wideband (UWB) support (gen2 chip)
Satellite featuresEmergency SOS, Messages and Find My via satelliteEmergency SOS, Messages and Find My via satellite

Durability

Durability specifications comparison
SpecificationiPhone 18 Pro Max 512GBiPhone Duo 256GB
Water resistanceIP68 dust tight and water resistant (immersible up to 6m for 30 min)IP68 dust tight and water resistant (immersible up to 6m for 30 min)

Features

Features specifications comparison
SpecificationiPhone 18 Pro Max 512GBiPhone Duo 256GB
SensorsFace ID, accelerometer, gyro, proximity, compass, barometerFingerprint (side-mounted), accelerometer, gyro, proximity, compass, barometer
ColorsBlack, Silver, Glacier, BurgundyNight Sky, Star White

Audio

Audio specifications comparison
SpecificationiPhone 18 Pro Max 512GBiPhone Duo 256GB
LoudspeakersYes, with stereo speakersYes, with stereo speakers
3.5 mm headphone jackNoNo

Similarities

  • Both have 12 GB RAM.
  • Both have 120 Hz displays.
  • Both are rated IP68.
  • Both have optical image stabilisation.
  • Both support Wi-Fi 7.
  • Both use Bluetooth 6.0.

In summary

Get the iPhone 18 Pro Max if you want optical zoom and sharper selfies, or the iPhone Duo if you would rather have a larger 7.6-inch screen and an anti-glare screen.

Back to compared products ↑

In-stock alternatives

Samsung Galaxy Z Fold 8 Ultra 512GBFor iPhone 18 Pro Max 512GBSamsung Galaxy Z Fold 8 Ultra 512GBView product ↗iPhone 18 Pro 512GBFor iPhone 18 Pro Max 512GBiPhone 18 Pro 512GBView product ↗Google Pixel 11 Pro Fold 256GBFor iPhone Duo 256GBGoogle Pixel 11 Pro Fold 256GBView product ↗

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