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Apple iPhone 8 Plus vs Apple iPhone Duo

Every spec side by side, from each maker's published figures.

Better figure, where one is clearly better

AppleiPhone 8 PlusAppleiPhone Duo
Overview
ReleasedSeptember 2017Coming 23 October 2026
Display
Screen size5.5″7.6″
Resolution1920 × 10802670 × 1878
Sharpness401 pixels per inch430 pixels per inch
PanelLCDLTPO OLED
Refresh rate60 Hz120 Hz
Peak brightness625 nits3,000 nits
Cover screen–5.4″, 2034 × 1398, 120 Hz
Display typeRetina HD display; 5.5-inch (diagonal) widescreen LCD Multi-Touch display with IPS technologySuper Retina XDR OLED folding display (inner) with nano-texture finish and wide-angle OLEDs; Dynamic Island on both displays
Pixel density401 ppi430 ppi (inner); 460 ppi (outer)
Brightness detail625 nits max brightness (typical)Both displays 1,000 nits max (typical); 1,600 nits peak (HDR); 3,000 nits peak (outdoor); 1 nit minimum
Always-on display–Yes
Screen protectionFingerprint-resistant oleophobic coatingCeramic Shield 2 on the outer display, Ceramic Shield back; inner display has a scratch-resistant coating over a nano-textured custom polymer cover layer, high-strength glass above and below the panel and a titanium plate beneath
Display featuresTrue Tone; wide colour display (P3); 3D Touch; 1300:1 contrast ratio (typical); dual-domain pixels for wide viewing angles; Display Zoom; ReachabilityProMotion adaptive refresh up to 120 Hz; HDR; True Tone; Wide colour (P3); Haptic Touch; 2,000,000:1 contrast ratio (typical); anti-reflective coating; Apple Pencil (USB-C) support on either display, which Apple says is coming later in 2026
Cover screen–5.4-inch Super Retina XDR OLED, 1398 x 2034 at 460 ppi, ProMotion up to 120 Hz, same aspect ratio as the inner display; measured as a standard rectangle the screens are 7.58 and 5.36 inches
Performance
ChipA11 BionicA20 Pro
Memory3 GB–
Storage64 GB, 128 GB, 256 GB256 GB, 512 GB, 1 TB, 2 TB
CPUSix-core (2x Monsoon + 4x Mistral) (GSMArena); 3 GB of Samsung LPDDR4 RAM (iFixit)6-core CPU with 2 super cores and 4 efficiency cores; 2-nanometre process
GPUApple-designed three-core GPU (GSMArena)7-core GPU with Neural Accelerators; hardware-accelerated ray tracing
AI engineNeural EngineDual 16-core Neural Engine
Cooling–Custom vapour chamber connected directly to the chip package; up to 35% better sustained performance than iPhone 17 Pro (Apple)
Cameras
Main camera12 MP48 MP
Ultra wide cameraNone48 MP
Telephoto camera12 MPNone
Optical zoom2×None
Front camera7 MP12 MP
Main camera12MP Wide, ƒ/1.8 aperture, optical image stabilisation, six-element lens, LED True Tone flash with Slow Sync48MP Fusion Main, 26 mm, ƒ/1.6 aperture, sensor-shift optical image stabilisation, Hybrid Focus Pixels; 24MP and 48MP photos
Ultra wide camera–48MP Fusion Ultra Wide, 13 mm, ƒ/2.2 aperture, 120° field of view, Hybrid Focus Pixels; 24MP and 48MP photos
Telephoto camera12MP Telephoto, ƒ/2.8 aperture, 2x optical zoom–
Front camera7MP FaceTime HD camera, ƒ/2.2 aperture, Retina Flash12MP Center Stage camera (outer), ƒ/2.2 aperture; under-display FaceTime camera in the inner display, ƒ/1.8 aperture, 1080p video (resolution in megapixels not published)
Zoom2x optical zoom in; digital zoom up to 10x (photos) and 6x (video)12MP optical-quality 2x Telephoto (52 mm, ƒ/1.6) from the Main camera; 2x optical-quality zoom in, 2x optical zoom out (4x optical-quality zoom range); digital zoom up to 10x (6x for video)
Video recording4K at 24, 30 or 60 fps; 1080p at 30 or 60 fps; 720p at 30 fps; optical image stabilisation for video; slo-mo 1080p at 120 or 240 fps; time-lapse with stabilisation; 8MP stills while recording 4K4K Dolby Vision at 24, 25, 30 or 60 fps, and at 100 or 120 fps on the Fusion Main camera; 1080p Dolby Vision up to 120 fps; Cinematic mode up to 4K Dolby Vision at 60 fps, with effects applied after capture; Action mode up to 2.8K Dolby Vision at 60 fps; slo-mo 1080p up to 240 fps and 4K Dolby Vision up to 120 fps (Fusion Main); Dual Capture up to 4K Dolby Vision at 30 fps; macro video; HEVC and H.264
Front video1080p HD at 30 fpsOuter camera 4K Dolby Vision at 24, 25, 30 or 60 fps, Cinematic mode up to 4K Dolby Vision at 30 fps, slo-mo 1080p at 120 fps; inner camera 1080p at 30 or 60 fps
Camera featuresPortrait mode; Portrait Lighting with five effects (Natural, Studio, Contour, Stage, Stage Mono); Live Photos with stabilisation; wide colour capture; auto HDR; panorama (up to 63MP); burst mode; HEIF and JPEGSmart Take; Duo Preview and Kid Cue on the outer display; Photographic Styles 3; smart focus tracking; Photonic Engine; Deep Fusion; Smart HDR 5; Night mode; next-generation portraits with Focus and Depth Control; panorama up to 63MP; 48MP macro photography; True Tone flash; sapphire crystal lens cover; Camera Control; HEIF and JPEG; no Pro controls
Battery and charging
Battery2,691 mAh–
Video playback (maker's claim)Up to 14 hoursUp to 31 hours
Wireless chargingYes (wattage not published)Up to 25 W
Battery life detailLasts about the same as iPhone 7 Plus; talk time up to 21 hours; internet use up to 13 hours; wireless video playback up to 14 hours; wireless audio playback up to 60 hours; 3.82 V, 10.28 Wh, 2,691 mAh (iFixit)Two lithium-ion batteries, one in each half, managed as one; up to 24 hours typical use (equal use of both displays); video playback up to 31 hours on the inner display and 44 hours on the outer; streamed video up to 26 hours inner and 37 hours outer
Wired chargingUp to 50% in 30 minutes with an 18W adapter or higher (sold separately)Up to 50% in around 20 minutes with a 60W-capable USB-C adapter or higher (sold separately); Apple doesn't give a maximum wattage
Wireless chargingWorks with Qi chargersMagSafe and Qi2 up to 25W; up to 50% in around 30 minutes with a 35W adapter or higher and a MagSafe Charger
Design
TypeStandardFoldable
Weight202 g254 g
Thickness7.5 mm11.3 mm
Height × width158.4 × 78.1 mm117.8 × 84.1 mm
Water and dust resistanceIP67IP68
Stylus–Yes
Size unfolded–117.8 × 164.6 × 5.2 mm (height × width × thickness)
MaterialsGlass front and back with an aluminium frameGrade 5 titanium enclosure with a mirror-polished finish (85% recycled titanium); 3D-printed titanium hinge cover with a micro-blasted finish; Ceramic Shield back
ColoursGold, Silver, Space Grey; (PRODUCT)RED from April 2018Star White, Night Sky
ButtonsHome/Touch ID sensor; volume up/down; ring/silent; side buttonSide button with Touch ID; Camera Control; volume up/down; no Action button
Water resistance detailIP67 (maximum depth of 1 metre up to 30 minutes) under IEC standard 60529IP68 (maximum depth of 6 metres up to 30 minutes) under IEC standard 60529
BiometricsTouch ID fingerprint sensor built into the Home buttonTouch ID fingerprint sensor in the side button
SensorsTouch ID fingerprint sensor; barometer; three-axis gyro; accelerometer; proximity sensor; ambient light sensorTouch ID; barometer; high dynamic range gyro; high-g accelerometer; proximity sensor; four ambient light sensors
SpeakersStereo speakersBuilt-in stereo speakers
Microphones–Built-in microphones; Voice Isolation and Wide Spectrum modes
Software
Operating systemiOSiOS
Software at launchiOS 11iOS 27.1 (Apple's press release; the spec page lists iOS 27)
AI features–Apple Intelligence; Siri AI (beta, English at launch, not initially available in the EU); Siri Camera mode through Camera Control
Safety features–Crash Detection
In the box–iPhone Duo, USB-C Charge Cable (1 m); no power adapter
Connectivity
Satellite messaging–Yes
Mobile networkModel A1897: UMTS/HSPA+/DC-HSDPA; GSM/EDGE; FDD-LTE (bands 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 29, 30, 66); TD-LTE (bands 34, 38, 39, 40, 41); VoLTE; Wi-Fi callingApple C2 modem; 5G (sub-6GHz) with 4x4 MIMO; Gigabit LTE with 4x4 MIMO; UK model A3720 (US model A3447 adds mmWave)
SIMNano-SIM (GSMArena)Dual eSIM only (two active, eight or more stored); no physical SIM
Wi-FiWi-Fi 802.11ac with MIMOWi-Fi 7 (802.11be) with 2x2 MIMO; Apple N1 wireless networking chip
BluetoothBluetooth 5.0Bluetooth 6; Thread
Ultra Wideband–Apple second-generation Ultra Wideband chip
NFCNFC with reader mode; Express CardsNFC with reader mode; Express Cards with power reserve
Satellite features–Emergency SOS via satellite; Roadside Assistance via satellite; Find My via satellite; Messages via satellite in the US
USBLightning connector; video mirroring and video out up to 1080p through the Lightning Digital AV Adapter and Lightning to VGA Adapter (sold separately)USB-C with charging, DisplayPort and USB 3 (up to 10Gb/s); video out up to 4K HDR
PositioningBuilt-in GPS/GNSS; digital compass; Wi-Fi; cellular; iBeacon microlocationPrecision dual-frequency GPS (GPS, GLONASS, Galileo, QZSS, BeiDou and NavIC); digital compass; iBeacon micro-location

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