Device summary

Apple

iPhone 18 Pro Max

POCO

X8

Full specifications

Full specifications
Basic information
Release year20262026
Starting price$1,299—
Display size6.9-inch6.8-inch
Dimensions78.0 mm × 163.4 mm × 8.8 mm78.3 mm × 163.4 mm × 8.6 mm
Weight249 g223 g
Front materialCeramic Shield 2—
Back materialCeramic Shield—
Display
Display technologySuper Retina XDR OLEDAMOLED
Resolution2868 × 13202772 × 1280
Refresh rate120 Hz120 Hz
Peak brightness3000 nits—
ProtectionCeramic Shield 2—
Performance
ChipsetApple A20 ProSnapdragon 6s Gen 4
Storage256 GB, 512 GB, 1024 GB, 2048 GB128 GB, 256 GB
Expandable storageNo—
RAM—6 GB, 8 GB, 12 GB
Cameras
Main cameraFusion Main · 48 MP · ƒ/1.48–ƒ/4.0 · 24 mm · Second-generation sensor-shift OISWide · 50 MP
Ultra-wide cameraFusion Ultra Wide · 48 MP · ƒ/2.2 · 13 mm—
Telephoto cameraFusion Telephoto · 48 MP · ƒ/2.8 · 100 mm · 4× optical zoom · 3D sensor-shift OIS—
Depth camera—Depth · 2 MP
Front camerasCenter Stage · 18 MP · ƒ/1.9Front · 16 MP
Video recording4K Dolby Vision up to 120 fps, ProRes up to 4K at 120 fps—
Battery & charging
Wired charging—67 W
Wireless charging25 W—
Charging standardUSB-C, MagSafe up to 25W, Qi2 up to 25W—
Video playback (Manufacturer claim)45 h—
Streamed video (Manufacturer claim)40 h—
Battery typeBuilt-in rechargeable lithium-ion—
Typical capacity—8340 mAh
Connectivity
Cellular5G (sub-6 GHz and mmWave), Gigabit LTE—
Wi‑FiWi‑Fi 7 (802.11be)—
BluetoothBluetooth 6—
USBUSB-C (USB 3, up to 10Gb/s)—
NFCYes—
eSIMYes—
SatelliteEmergency SOS via satellite—
Build & durability
FrameAluminum unibody—
Ingress protectionIP68IP66/IP68/IP69/IP69K

Key differences

The most meaningful measured gaps in size and weight — not an overall winner.

  • Weight

    X8

    26 g lighter

  • Height

    Very similar height

  • Width

    Very similar width

  • Thickness

    Very similar thickness

What these size differences mean

Calculated from the dimensions shown, rounded to 0.1 mm and 1 g. Percentages use the smaller measurement as the reference. Fold and rotation settings affect the dimensions compared.

  • X8 is 0.3 mm (0.4% relative to iPhone 18 Pro Max) wider. Check this difference against the width of your current device and pocket opening.
  • Both have the same listed height (163.4 mm) at the displayed precision. This describes the body outline; screen diagonal alone does not tell you the overall size.
  • iPhone 18 Pro Max is 0.2 mm (2.3% relative to X8) thicker. Cases and camera protrusions can change the clearance you need.
  • X8 is 26 g lighter. This is the listed device-weight difference, not a measured comfort rating.

Use these figures to compare physical size. They do not establish one-handed reach, pocket fit, durability or an overall winner.

Size in everyday life

Picture it in your front pocket.

Front pocket reference

2018 US jeans study · 20 brands · 80 pairs · Approx. 32-inch waists

iPhone 18 Pro Max

X8

Sources and measurement notes

Sizometry compares published specifications and calculates differences. These are not hands-on measurements or tests of comfort, performance or pocket fit.

Check the exact model, year, region and configuration on the linked page. References may cover several variants. Folded and unfolded dimensions differ; cases and camera protrusions may change the space a device needs. Drawings share a relative scale and are not calibrated to life size on your screen.

iPhone 18 Pro Max vs X8 Size Comparison

Compare in Sizometry Tool

See both devices at the same scale.