Apple iPhone 18 Pro / Samsung Galaxy S24 (SM-S921B)

Apple iPhone 18 Pro: 6.3-inch Pro

Samsung Galaxy S24 (SM-S921B): Galaxy S24, global SM-S921B (8 GB / 128 GB, Nano-SIM + eSIM). The US SM-S921U uses a different processor; the Galaxy S24+ and S24 Ultra are separate models.

SpecificationApple iPhone 18 ProSamsung Galaxy S24 (SM-S921B)
Release year20262024
Display6.3-inch Super Retina XDR OLED; 2622 × 1206; 460 ppi; Always-On Apple6.2-inch (6.0-inch with rounded corners) Dynamic AMOLED 2X; 2340 × 1080 (FHD+); adaptive 1–120 Hz; Vision Booster

The adaptive refresh rate drops to 1 Hz on static content to save power; Vision Booster adjusts tone and contrast in bright light.

Samsung
Refresh rateProMotion; adaptive, up to 120 Hz

The display lowers its refresh rate for static content to save power, which lets the Always-On display stay lit.

Apple		—
ProcessorA20 Pro; 6-core CPU (2 performance, 4 efficiency); 7-core GPU with Neural Accelerators; dual 16-core Neural Engine

The GPU supports hardware ray tracing.

Apple		10 cores; 3.2 GHz, 2.9 GHz, 2.6 GHz and 1.95 GHz clusters

Samsung notes that the processor varies by market; the US SM-S921U does not use the same chip as this global model.

Samsung
Storage256 GB / 512 GB / 1 TB / 2 TB Apple—
Body and finishesAluminium unibody; Black, Silver, Glacier, Burgundy Apple—
Brightness1000 nits typical; 1600 nits peak HDR; 3000 nits peak outdoors; 1 nit minimum

Peak figures do not describe sustained full-screen brightness.

Apple		—
Contrast2,000,000:1 (typical) Apple—
GlassCeramic Shield 2 front; Ceramic Shield back Apple—
Main camera48 MP Fusion; 24 mm; variable aperture ƒ/1.48–ƒ/4.0; second-generation sensor-shift OIS

The variable aperture lets you control depth of field and starburst effects manually; the 48 mm 2× view is a 12 MP sensor crop.

Apple		—
Ultra wide48 MP Fusion; 13 mm; ƒ/2.2; 120° field of view Apple—
Telephoto48 MP Fusion; 100 mm (4×); ƒ/2.8; tetraprism; 3D sensor-shift OIS

Apple describes the 200 mm 8× view as a 12 MP optical-quality crop; digital zoom reaches 40×.

Apple		—
Video4K Dolby Vision at 24–60 fps and 100/120 fps on the main camera; 4K 120 fps ProRes with external recording; Cinematic 4K 60 fps; Action 2.8K 60 fps Apple8K (7680 × 4320) at 30 fps; slow motion at UHD 120 fps and FHD 240 fps Samsung
Front camera18 MP Center Stage; ƒ/1.9; autofocus; 4K Dolby Vision 60 fps Apple12 MP, ƒ/2.2, 80° Samsung
ButtonsCamera Control (exposure, depth, zoom, cameras, styles, tone); Action button Apple—
USB-CUSB 3, 10 Gbit/s; DisplayPort; 4K HDR video out

10 Gbit/s requires a USB 3 cable.

Apple		—
ChargingWired: about 50% in 15 minutes with a 60 W or higher adapter; MagSafe and Qi2: up to 25 W

About 50% in 30 minutes over MagSafe with a 35 W or higher adapter.

Apple		—
BatteryUp to 24 hours typical use; up to 36 hours video; up to 33 hours streamed video

Apple test figures; real-world results vary with apps and signal.

Apple		—
DurabilityIP68: up to 6 m for up to 30 minutes (IEC 60529)

Water and dust resistance can decrease with normal wear.

Apple		IP68 (up to 1.5 m of fresh water for up to 30 minutes) Samsung
Wireless5G (sub-6 GHz and mmWave); Apple C2 modem; Wi-Fi 7, Bluetooth 6 and Thread via Apple N1; second-generation UWB; NFC

mmWave and UWB availability vary by country.

Apple		—
SIMeSIM only; two active eSIMs

Configuration on the US model page; SIM tray availability can differ by country.

Apple		—
SatelliteEmergency SOS, Roadside Assistance, Messages and Find My via satellite; Crash Detection

Satellite features work only in supported countries.

Apple		—
Size / weight150.0 × 71.9 × 8.75 mm; 211 g Apple—
SoftwareiOS 27 Apple—
Operating temperature0–35 °C

Above this range the phone limits performance and charging to protect itself.

Apple		—
Model code—SM-S921B/DS; Nano-SIM + eSIM or dual eSIM Samsung
Memory and storage—8 GB RAM; 128 GB (about 103.9 GB available)

The series also has 256 and 512 GB and 12 GB RAM configurations; there is no microSD slot.

Samsung
Rear cameras—50 MP wide (ƒ/1.8, OIS, 85°); 10 MP 3x telephoto (ƒ/2.4, 36°); 12 MP ultra-wide (ƒ/2.2, 120°)

3x optical zoom uses the separate telephoto lens; the 2x option crops the main sensor at optical quality, and digital zoom reaches 30x.

Samsung
Battery and charging—4000 mAh typical (3880 mAh rated); about 50% in 30 minutes with a 25 W adapter and 3 A cable; Fast Wireless Charging 2.0; Wireless PowerShare

Wireless PowerShare lets the back of the phone wirelessly charge small devices such as a watch or earbud case. No adapter is included.

Samsung
Rated battery life—Up to 29 hours of video playback; rated for at least 2000 charge cycles; energy efficiency class A

The 2000-cycle figure comes from the EU label, which targets the battery keeping a set share of its capacity over that span.

Samsung
Connectivity—5G; Wi-Fi 6E (2.4 + 5 + 6 GHz); Bluetooth 5.3; NFC; USB Type-C (USB 3.2 Gen 1)

The 6 GHz band needs a Wi-Fi 6E router.

Samsung
Location and sensors—GPS, GLONASS, BeiDou, Galileo, QZSS; accelerometer, barometer, fingerprint, gyro, geomagnetic, Hall, light and proximity sensors Samsung
Operating system—Shipped with Android 14 and One UI 6.1; seven generations of OS upgrades and seven years of security updates

Samsung’s UK page lists security updates for this model until 31 January 2031; timing can vary by market.

Samsung
Size and weight—147.0 × 70.6 × 7.6 mm; 167 g Samsung
Colours—Onyx Black, Marble Grey, Cobalt Violet, Amber Yellow; extra online colours Samsung