Head to head
Apple iPhone DuovsApple iPhone 18 Pro Max
- Released
- 2026-10-23Apple Newsroom UK — Apple unveils iPhone Duo, retrieved 2026-09-10
- Price
- £1999Apple UK store, retrieved 2026-09-10
- Released
- 2026-09-18Apple Newsroom UK — Apple debuts iPhone 18 Pro and iPhone 18 Pro Max, retrieved 2026-09-10
- Price
- £1299Apple UK store, retrieved 2026-09-10
0 wins for iPhone Duo1 win for iPhone 18 Pro Max3 differences you won’t notice
True to scale
Outlines from each maker’s published dimensions, drawn to scale. Corner rounding is our drawing convention, not a measurement.
Specifications
A win is marked only where the figures can be ranked and the gap is one you could notice. Every figure carries its source.
Body
Apple iPhone DuoApple iPhone 18 Pro Max
Dimensions
117.8 x 84.1 x 11.3 mmOfficial
163.4 x 78.0 x 8.75 mmOfficial
Weight
254gOfficial
249gOfficial
You won’t notice this difference.
Build
Titanium foldable design with precision hinge, Ceramic Shield 2 front and backOfficial
Aluminium unibody design, Ceramic Shield 2 front, Ceramic Shield backOfficial
SIM
Dual eSIM (two active eSIMs; stores eight or more eSIMs); no SIM trayOfficial
Dual SIM (nano-SIM and eSIM)Official
Water/dust rating
IP68Official
IP68Official
Unlock
Touch ID (fingerprint sensor in the side button)Official
Face ID (TrueDepth camera)Official
Display
Apple iPhone DuoApple iPhone 18 Pro Max
Display type
Super Retina XDR OLED folding inner display with nano-texture finish; Super Retina XDR OLED outer display; Always-On; ProMotion on bothOfficial
Super Retina XDR OLED, Always-On, HDR, True Tone, Wide colour (P3)Official
Display size
7.6inOfficial
6.9inOfficial
Resolution
1878 x 2670 (inner); 1398 x 2034 (outer)Official
2868 x 1320Official
Pixel density
430ppiOfficial
460ppiOfficial
Refresh rate
120HzOfficial
120HzOfficial
You won’t notice this difference.
Peak brightness
3000nitsOfficial
3000nitsOfficial
You won’t notice this difference.
Typical brightness
1000nitsOfficial
1000nitsOfficial
HDR peak brightness
1600nitsOfficial
1600nitsOfficial
Screen protection
Ceramic Shield 2 front and back; custom polymer nano-texture layer on the inner displayOfficial
Ceramic Shield 2 frontOfficial
Platform
Apple iPhone DuoApple iPhone 18 Pro Max
Operating system
iOS 27Official
iOS 27Official
Chipset
A20 Pro chipOfficial
A20 Pro chipOfficial
CPU
6-core CPU with 2 super cores and 4 efficiency coresOfficial
6-core CPU with 2 super cores and 4 efficiency coresOfficial
GPU
7-core GPUOfficial
7-core GPU with Neural AcceleratorsOfficial
Memory
Apple iPhone DuoApple iPhone 18 Pro Max
Storage (base)
256GBOfficial
256GBOfficial
Storage options
256GB/512GB/1TB/2TBOfficial
256GB/512GB/1TB/2TBOfficial
RAM
12GB3rd party
12GB3rd party
Card slot
No3rd party
No3rd party
Camera
Apple iPhone DuoApple iPhone 18 Pro Max
Main camera
48MP Dual Fusion camera system: 48MP Fusion Main 26mm f/1.6 with sensor-shift OIS, giving a 12MP optical-quality 2x Telephoto at 52mm; 48MP Fusion Ultra Wide 13mm f/2.2Official
48MP Pro Fusion camera system: 48MP Fusion Main 24mm with variable aperture (f/1.48, f/1.8, f/2.8, f/4.0) and second-generation sensor-shift OIS; 48MP Fusion Ultra Wide 13mm f/2.2; 48MP Fusion Telephoto 100mm (4x) f/2.8 with 3D sensor-shift OIS; 8x optical-quality zoom in, 2x optical zoom out; digital zoom up to 40xOfficial
Main sensor resolution
48MPOfficial
48MPOfficial
Main aperture
f/1.6Official
f/1.48 to f/4.0 (variable)Official
Main sensor size
1/1.28"3rd party
1/1.28"3rd party
Telephoto
No dedicated telephoto lens; 12MP optical-quality 2x (52mm) crop from the 48MP Fusion MainOfficial
48MP Fusion Telephoto, 100mm (4x), f/2.8, 3D sensor-shift optical image stabilisationOfficial
Ultrawide
48MP Fusion Ultra Wide, 13mm, f/2.2Official
48MP Fusion Ultra Wide, 13mm, f/2.2Official
Front camera
12MP Center Stage camera (outer display), f/2.2; under-display FaceTime camera (inner display), f/1.8Official
18MP Center Stage, f/1.9 aperture, autofocus with Focus PixelsOfficial
Video capture
4K Dolby Vision at 24, 25, 30, 60, 100 or 120 fpsOfficial
4K Dolby Vision at 24, 25, 30, 60, 100 (Fusion Main) or 120 fpsOfficial
Battery
Apple iPhone DuoApple iPhone 18 Pro Max
Battery capacity
No verified data
5391mAh3rd party
Claimed video playback
31hOfficial
43hOfficial
Fast charging
No verified data
60WOfficial
Wireless charging
25WOfficial
25WOfficial
Connectivity
Apple iPhone DuoApple iPhone 18 Pro Max
Wi-Fi
Wi-Fi 7 (802.11be)Official
Wi-Fi 7 (802.11be) with 2x2 MIMOOfficial
Bluetooth
6Official
6Official
USB
USB-C, USB 3, DisplayPortOfficial
USB-C, USB 3 (up to 10Gb/s), DisplayPortOfficial
NFC
YesOfficial
YesOfficial
Positioning
No verified data
Precision dual-frequency GPS (GPS, GLONASS, Galileo, QZSS, BeiDou and NavIC)Official
Misc
Apple iPhone DuoApple iPhone 18 Pro Max
Colours
Night Sky, Star WhiteOfficial
Black, Silver, Glacier, BurgundyOfficial
8 attributes neither phone has a sourced figure for
Battery per charge · Battery lifespan · Geekbench 6 (CPU, multi-core) · AnTuTu benchmark · 3DMark Wild Life Extreme · DXOMARK camera score · SAR (EU, head) · Repairability (EU class). Rows appear as sources are cited — a gap in our data, not a statement about either phone.