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Watch comparison

Apple Ultra 2 vs Apple Ultra 4 49mm

Compare battery life, health tracking, display and fit.

Compared products
01Selected
Apple Watch Ultra 2

Apple Watch Ultra 2

  • Screen: 410 × 502 pixels; 326 ppi; 1,185 mm² display area.
  • Apple S9; 4-core Neural Engine processor.
  • 64 GB storage in this version.
  • Runs watchOS 10, upgradable to watchOS 27.
  • Wi-Fi 4 support.
KSh 103,500In Stock
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02
Apple Watch Ultra 4 49mm

Apple Watch Ultra 4 49mm

  • 1.98 inch screen.
  • Apple S11 processor.
  • 64 GB storage in this version.
  • Runs watchOS 27.
  • Wi-Fi 4 support.
KSh 118,000In Stock
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Apple Watch Ultra 3KSh 90,000
Apple Watch Series 12 46mmKSh 70,000
Apple Watch UltraKSh 90,000
Huawei Watch Ultimate 2KSh 124,000
Amazfit T-Rex Ultra 2KSh 85,000
Huawei Watch D3KSh 75,000
Amazfit GTR 3 ProKSh 20,000
2 of 4 products

Our quick verdict

The Apple Watch Ultra 4 49mm is the better buy: it lasts longer per charge (50 hours), gives daily readiness scores and has faster recharging (45 minutes).

Display

Apple Watch Ultra 2
410 × 502 pixels; 326 ppi; 1,185 mm² display area
Apple Watch Ultra 4 49mm
422 × 514 pixels; 326 ppi; 1,245 mm² display area

Performance

Apple Watch Ultra 2
Apple S9; 4-core Neural Engine processor
Apple Watch Ultra 4 49mm
Apple S11 processor

Software

Apple Watch Ultra 2
Runs watchOS 10, upgradable to watchOS 27
Apple Watch Ultra 4 49mm
Runs watchOS 27

Battery life

Apple Watch Ultra 2
Up to 36 hours per charge
Apple Watch Ultra 4 49mm
Up to 50 hours per charge

Portability

Apple Watch Ultra 2
61.4 g
Apple Watch Ultra 4 49mm
63 g

Key differences

The main differences to help you choose.

Apple Watch Ultra 2

  • OLED display, 326 ppi.
  • Apple S9 processor.
  • 64 GB storage.
  • Up to 36 hours per charge.

Apple Watch Ultra 4 49mm

  • Rated for up to 50 hours per charge (vs 36).
  • Daily readiness scores.
  • Recharges faster: 45 minutes (vs 1 hour).
  • Blood-pressure (hypertension) notifications.
  • Newer model: released in 2026 (vs 2023).
  • Newer watchOS 27 (vs watchOS 10).

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
PriorityApple Watch Ultra 2Apple Watch Ultra 4 49mm
Battery lifeUp to 36 hours per chargeUp to 50 hours per charge
Storage64 GB storage64 GB storage
DisplayOLED display, 326 ppi1.98-inch OLED display, 326 ppi
PerformanceApple S9 processorApple S11 processor
SoftwarewatchOS 10watchOS 27
ConnectionsWi-Fi 4, Bluetooth 5.3Wi-Fi 4, Bluetooth 5.3

Detailed comparison

Explore the full specifications, section by section.

Display

Display specifications comparison
SpecificationApple Watch Ultra 2Apple Watch Ultra 4 49mm
DisplayAlways-On Retina LTPO2 OLEDRetina LTPO3 OLED, 3000 nits (peak); 1.98 inches
Screen resolution410 × 502 pixels; 326 ppi; 1,185 mm² display area422 × 514 pixels; 326 ppi; 1,245 mm² display area
Display protectionFlat sapphire crystalSapphire crystal
Display features3000 nits (peak)3000 nits (peak); Wide-angle OLED

Connectivity

Connectivity specifications comparison
SpecificationApple Watch Ultra 2Apple Watch Ultra 4 49mm
Network / cellularGSM / HSPA / LTEGSM / HSPA / LTE / 5G
SIM / eSIMeSIMeSIM
Wi-FiWi-Fi 802.11 b/g/n, dual-bandWi-Fi 802.11 b/g/n, dual-band
Bluetooth5.3, A2DP, LE5.3, A2DP, LE
NFCSupported; Apple PayYes
Positioning / GNSSGPS (L1+L5), GLONASS, GALILEO, BDSGPS (L1+L5), GLONASS, GALILEO, BDS, QZSS
Ultra Wideband (UWB)Ultra Wideband (UWB) support (gen2 chip)Ultra Wideband (UWB) support (gen2 chip)
Satellite features—Emergency SOS via satellite

Identity & design

Identity & design specifications comparison
SpecificationApple Watch Ultra 2Apple Watch Ultra 4 49mm
BrandAppleApple
ModelApple Watch Ultra 2Apple Watch Ultra 4 49mm
Announced2023, September 122026, September 09
Dimensions49 × 44 × 12 mm49 x 44 x 12 mm (1.93 x 1.73 x 0.47 in)
WeightNatural titanium: 61.4 g; black titanium: 61.8 gNatural titanium: 63.0 g; black titanium: 63.1 g
Build materialsTitanium case; sapphire crystal front; ceramic and sapphire crystal backGrade 5 titanium case; sapphire crystal front; ceramic and sapphire crystal back
Wrist size130–210 mm130–210 mm
Controls / buttonsCustomizable Action button; Digital Crown with haptic feedback; side buttonCustomizable Action button; Digital Crown with haptic feedback; side button; single tap, double tap and wrist flick gestures
Strap / band—Included band; style depends on the selected configuration

Performance & software

Performance & software specifications comparison
SpecificationApple Watch Ultra 2Apple Watch Ultra 4 49mm
ProcessorApple S9; 4-core Neural EngineApple S11
CPU64-bit dual-coreDual-core
GPUPowerVRPowerVR
Storage64 GB64GB
Operating systemwatchOS 10, upgradable to watchOS 27watchOS 27

Audio & communication

Audio & communication specifications comparison
SpecificationApple Watch Ultra 2Apple Watch Ultra 4 49mm
SpeakerDual speakers; sirenDual speakers; media playback; siren
MicrophoneThree-microphone array with beamforming and wind-noise mitigationThree-microphone array with beamforming and wind-noise mitigation
CallingCellular and Bluetooth calling; international emergency callingCellular and Bluetooth calling; international emergency calling

Sensors, health & fitness

Sensors, health & fitness specifications comparison
SpecificationApple Watch Ultra 2Apple Watch Ultra 4 49mm
SensorsBlood oxygen sensor; electrical heart sensor; third-generation optical heart sensor; temperature sensor; depth gauge; water-temperature sensor; compass; always-on altimeter; high-g accelerometer; high-dynamic-range gyroscope; ambient light sensorElectrical heart sensor; always-on optical heart sensor; blood oxygen sensor; temperature sensor; depth gauge; water-temperature sensor; compass; always-on altimeter; high-g accelerometer; high dynamic-range gyroscope; ambient-light sensor
Health & wellness featuresECG app; Blood Oxygen app where available; heart-rate notifications; irregular rhythm notifications; temperature sensing; cycle trackingHeart rate; HRV; blood oxygen; ECG; wrist temperature; respiratory rate; Readiness; Vitals; cycle tracking; high/low heart-rate, irregular rhythm and hypertension notifications (regional availability)
Sleep trackingSleep duration and sleep stagesSleep duration; sleep stages; sleep score; sleep-apnea notifications (regional availability)
Sports / workout modesWorkout app with running, cycling, swimming, multisport and other workout typesRunning; hiking; cycling; pool and open-water swimming; skiing; snowboarding; rowing; paddling; golf; walking; HIIT; yoga; strength; dance; Pilates; Tai Chi; kickboxing; multisport and more
Training & outdoor featuresPrecision dual-frequency GPS; offline maps; compass waypoints and Backtrack; running dynamics; cycling metricsCustom workouts and views; Training Load and Workout Effort; heart-rate zones; VO₂ max; Race Route; Pacer; running dynamics; automatic track detection; offline maps, routes, waypoints, Backtrack and elevation alerts
Safety & emergency featuresEmergency SOS; international emergency calling; Fall Detection; Crash DetectionEmergency SOS; satellite SOS and messaging; international emergency calling; siren; flashlight; Fall Detection; Crash Detection; Check In; noise monitoring; emergency waypoints
Diving / depth featuresRecreational scuba diving to 40 m; depth gauge; water-temperature sensorRecreational scuba diving to 40 m; automatic dive launch at 1 m; current/maximum depth and duration; GPS entry/exit points; depth gauge and water temperature

Battery & durability

Battery & durability specifications comparison
SpecificationApple Watch Ultra 2Apple Watch Ultra 4 49mm
Battery lifeUp to 36 hours normal use; 72 hours Low Power ModeUp to 50 hours normal use; 84 hours Low Power Mode; 18 hours workout tracking; 25 hours Extended Workout; 45 hours Max Extended Workout
ChargingMagnetic fast chargingMagnetic fast charging; up to 80% in about 45 minutes
Water resistance100 m under ISO 22810:2010100 m under ISO 22810:2010; suitable for swimming, snorkeling, scuba and high-speed water sports
Durability / certificationsIP6X dust resistance; MIL-STD-810H; EN13319IP6X dust resistance under IEC 60529; EN 13319 recreational diving to 40 m; tested to MIL‑STD‑810H
Battery capacity—Li-Ion 631 mAh

Compatibility

Compatibility specifications comparison
SpecificationApple Watch Ultra 2Apple Watch Ultra 4 49mm
Phone compatibilityiPhone XS or later, including iPhone SE (2nd generation or later); iOS 18 or lateriPhone 11 or later, including iPhone SE (2nd generation or later), with iOS 27 or later
Companion appApple Watch app on iPhoneApple Watch app on iPhone
ColorsTitanium, BlackNatural, Black

Additional specifications

Additional specifications specifications comparison
SpecificationApple Watch Ultra 2Apple Watch Ultra 4 49mm
Case materialTitaniumGrade 5 titanium
Military-grade resistanceMIL-STD-810HMIL-STD-810H
FlashlightSupportedSupported
Pixels per inch326 ppi326 ppi
Peak brightnessUp to 3,000 nits; 1 nit minimumUp to 3,000 nits peak; 1 nit minimum
Cover / touchscreenSupportedSupported
Charging timeAbout 1 hour to 80%About 45 minutes to 80%; 15 minutes for up to 18 hours normal use; 5 minutes for up to 10 hours sleep tracking
Release statusAvailable. Released 2023, September 22Available. Released 2026, September 18
Model numbersA2986, A2987, Watch7,5A3579
Card slotNoNo
CameraNoNo
3.5 mm headphone jackNoNo
USBNoNo
RadioNoNo
2G bandsGSM 850 / 900 / 1800 / 1900GSM 850 / 900 / 1800 / 1900
3G bandsHSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 - International, China, HK; HSDPA 850 / 1700(AWS) / 1900 / 2100 - USA, LATAM, CanadaHSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
4G bands1, 2, 3, 4, 5, 6, 7, 8, 18, 19, 20, 25, 26, 28, 39, 40, 41, 66 - International, China, HK; 1, 2, 3, 4, 5, 6, 7, 12, 13, 14, 17, 18, 19, 25, 26, 39, 40, 41, 66 - USA, LATAM, Canada1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 17, 18, 19, 20, 25, 26, 28, 38, 39, 40, 41, 53, 66, 71
Network speedHSPA, LTEHSPA, LTE, 5G
SAR (US)0.88 W/kg (head)—
SAR (EU)0.22 W/kg (head)—
Additional hardware featuresTemperature sensing (0.01˚ accuracy); Depth gauge (±1m accuracy)Health Sensing System: third‑generation electrical heart sensor, always‑on optical heart sensor, blood oxygen sensor, temperature sensor; Temperature sensing (0.01˚ accuracy); Depth gauge (±1m accuracy)
Battery typeRechargeable lithium-ion—
Display material—LTPO3 wide-angle OLED
Packing list—Apple Watch Ultra 4; band; 1 m magnetic fast-charger to USB-C cable
5G bands—1, 2, 3, 5, 7, 8, 12, 14, 20, 25, 26, 28, 38, 40, 41, 53, 66, 71 SA/NSA

Similarities

  • Both belong to the Apple Watch platform.
  • Both support Wi-Fi 4.
  • Both use Bluetooth 5.3.
  • Both work with a companion app.
  • Both have NFC.
  • Both have a titanium case.

In summary

The Apple Watch Ultra 4 49mm is the better buy for almost everyone, with longer rated battery life and daily readiness scores.

Back to compared products ↑

In-stock alternatives

Apple Watch UltraFor Apple Watch Ultra 2Apple Watch UltraView product ↗Apple Watch Ultra 3For Apple Watch Ultra 2Apple Watch Ultra 3View product ↗Apple Watch Series 12 42mmFor Apple Watch Ultra 4 49mmApple Watch Series 12 42mmView product ↗Apple Watch Series 11For Apple Watch Ultra 4 49mmApple Watch Series 11View product ↗

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Apple Watch Ultra 2Apple Watch Ultra 3Apple Watch Ultra 2Apple Watch Series 12 46mmApple Watch UltraApple Watch Ultra 2Apple Watch Ultra 2Huawei Watch Ultimate 2Apple Watch Ultra 2Amazfit T-Rex Ultra 2Apple Watch Ultra 2Huawei Watch D3
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