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Watch comparison

Samsung Galaxy 8 Classic vs Samsung Galaxy Ultra 2025

Compare battery life, health tracking, display and fit.

Compared products
01Selected
Samsung Galaxy Watch 8 Classic

Samsung Galaxy Watch 8 Classic

  • Screen: 438 × 438 pixels.
  • Exynos W1000, 3 nm processor.
  • 2 GB RAM in this version.
  • 64 GB storage in this version.
  • Runs Wear OS 6; One UI 8 Watch.
KSh 38,500In Stock
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02
Samsung Galaxy Watch Ultra 2025

Samsung Galaxy Watch Ultra 2025

  • Screen: 480 × 480 pixels.
  • Exynos W1000, 3 nm processor.
  • 2 GB RAM in this version.
  • 64 GB storage in this version.
  • Runs Wear OS 6; One UI 8 Watch.
KSh 44,000In Stock
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2 spaces available

Samsung Galaxy Watch 9 44mmKSh 42,000
OnePlus Watch 4KSh 38,500
Samsung Galaxy Watch 9 40mmKSh 39,500
Samsung Galaxy Watch UltraKSh 45,000
Google Pixel Watch 3KSh 37,500
WHOOP ONE 5.0 SensorKSh 37,000
Amazfit Balance 2KSh 39,000
2 of 4 products

Our quick verdict

With the same Exynos W1000 processor, 2 GB of RAM and IP68 rating, the Samsung Galaxy Watch Ultra 2025 lasts longer per charge (80 hours), takes ECG heart-rhythm readings and has a larger 1.5-inch, sharper screen, while the Samsung Galaxy Watch 8 Classic is slimmer.

Display

Samsung Galaxy Watch 8 Classic
438 × 438 pixels
Samsung Galaxy Watch Ultra 2025
480 × 480 pixels

Battery capacity

Samsung Galaxy Watch 8 Classic
445 mAh battery capacity
Samsung Galaxy Watch Ultra 2025
590 mAh battery capacity

Portability

Samsung Galaxy Watch 8 Classic
63.5 g
Samsung Galaxy Watch Ultra 2025
60.5 g

Water resistance

Samsung Galaxy Watch 8 Classic
5 ATM, IP68
Samsung Galaxy Watch Ultra 2025
10 ATM, IP68

Controls / buttons

Samsung Galaxy Watch 8 Classic
Rotating bezel, Quick Button
Samsung Galaxy Watch Ultra 2025
Touchscreen, quick button

Key differences

The main differences to help you choose.

Samsung Galaxy Watch 8 Classic

  • Slimmer: 10.6 mm thick (vs 12.1 mm).
  • Lower price: KSh 38,500 (vs KSh 44,000).

Samsung Galaxy Watch Ultra 2025

  • Rated for up to 80 hours per charge (vs 40).
  • Bigger battery: 590 mAh (vs 445 mAh).
  • Larger 1.5-inch screen (vs 1.34-inch).
  • ECG heart-rhythm readings.
  • Titanium case (vs stainless steel case).
  • Swimproof: water resistant to 100 m (vs 50 m).

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
PrioritySamsung Galaxy Watch 8 ClassicSamsung Galaxy Watch Ultra 2025
Battery lifeUp to 40 hours per chargeUp to 80 hours per charge
Storage64 GB storage64 GB storage
Display1.34-inch OLED display1.5-inch OLED display
PerformanceExynos W1000 processorExynos W1000 processor
Memory2 GB RAM2 GB RAM
Battery capacity445 mAh battery590 mAh battery

Detailed comparison

Explore the full specifications, section by section.

Display

Display specifications comparison
SpecificationSamsung Galaxy Watch 8 ClassicSamsung Galaxy Watch Ultra 2025
Display1.34-inch Super AMOLED1.5-inch Super AMOLED
Screen resolution438 × 438 pixels480 × 480 pixels
Display protectionSapphire crystalSapphire crystal
Display featuresFull-colour always-on displayFull-colour always-on display

Connectivity

Connectivity specifications comparison
SpecificationSamsung Galaxy Watch 8 ClassicSamsung Galaxy Watch Ultra 2025
Network / cellularGSM / HSPA / LTEGSM / HSPA / LTE
SIM / eSIMeSIMeSIM
Wi-FiWi-Fi 2.4 GHz + 5 GHzWi-Fi 2.4 GHz + 5 GHz
BluetoothBluetooth 5.3Bluetooth 5.3
NFCSupportedSupported
Positioning / GNSSDual-frequency GPS, L1 + L5; GLONASS; BeiDou; GalileoDual-frequency GPS, L1 + L5; GLONASS; BeiDou; Galileo

Identity & design

Identity & design specifications comparison
SpecificationSamsung Galaxy Watch 8 ClassicSamsung Galaxy Watch Ultra 2025
BrandSamsungSamsung
ModelSamsung Galaxy Watch 8 ClassicSamsung Galaxy Watch Ultra 2025
Announced2025, July 092024, July 10
Dimensions46.4 × 46.0 × 10.6 mm47.1 × 47.4 × 12.1 mm
Weight63.5 g without band60.5 g without band
Build materialsStainless-steel caseTitanium case
Controls / buttonsRotating bezel; Quick Button; Home and Back buttonsTouchscreen; Quick button; Home and Back buttons; Double Pinch gesture

Performance & software

Performance & software specifications comparison
SpecificationSamsung Galaxy Watch 8 ClassicSamsung Galaxy Watch Ultra 2025
ProcessorExynos W1000, 3 nmExynos W1000, 3 nm
CPU5-core5-core
GPUMali-G68Mali-G68
RAM2 GB2 GB
Storage64 GB64 GB
Operating systemWear OS 6; One UI 8 WatchWear OS 6; One UI 8 Watch

Audio & communication

Audio & communication specifications comparison
SpecificationSamsung Galaxy Watch 8 ClassicSamsung Galaxy Watch Ultra 2025
SpeakerSupportedSupported
MicrophoneSupportedSupported
CallingBluetooth calling with a connected smartphone; standalone calling on LTE editionsBluetooth calling with a connected smartphone; standalone calling on LTE editions

Sensors, health & fitness

Sensors, health & fitness specifications comparison
SpecificationSamsung Galaxy Watch 8 ClassicSamsung Galaxy Watch Ultra 2025
SensorsSamsung BioActive: optical heart-rate, electrical heart signal, bioelectrical impedance analysis; temperature; accelerometer; barometer; gyroscope; geomagnetic; light sensor; 3D Hall sensorSamsung BioActive: optical heart-rate, electrical heart signal, bioelectrical impedance analysis; temperature; accelerometer; barometer; gyroscope; geomagnetic; light sensor
Health & wellness featuresHeart and wellness tracking; Antioxidant Index, Vascular Load, Energy Score and stress features. Availability varies by market and paired phone.Heart-rate monitoring, ECG, blood pressure, body composition, blood oxygen, skin temperature, Energy Score, Antioxidant Index and Vascular Load; availability varies by market and paired phone
Sleep trackingSleep tracking, sleep coaching, Bedtime Guidance and sleep-apnoea features where availableSleep tracking, Bedtime Guidance, sleep coaching and sleep-apnoea features where available
Training & outdoor featuresRunning Coach and dual-frequency route trackingDual-frequency GPS; GPX routes; Track Back; Running Coach; personalised heart-rate zones; Functional Threshold Power
Sports / workout modes—Multiple workout modes including multisport and automatic workout detection
Safety & emergency features—Fall detection, SOS and siren features when configured

Battery & durability

Battery & durability specifications comparison
SpecificationSamsung Galaxy Watch 8 ClassicSamsung Galaxy Watch Ultra 2025
Battery capacity445 mAh590 mAh
Battery lifeAlways-On Display off: up to 40 hours Always-On Display on: up to 30 hoursUp to 80 hours with Always-On Display off; up to 60 hours with Always-On Display on; up to 100 hours in Power Saving Mode
ChargingFast wireless charging, WPC-basedFast wireless charging, WPC-based
Water resistance5 ATM; IP6810 ATM; IP68
Durability / certificationsMIL-STD-810HMIL-STD-810H

Compatibility

Compatibility specifications comparison
SpecificationSamsung Galaxy Watch 8 ClassicSamsung Galaxy Watch Ultra 2025
Phone compatibilityAndroid 12.0 or later; more than 1.5 GB RAMAndroid 11.0 or later; more than 1.5 GB RAM
Companion appGalaxy Wearable; Samsung HealthGalaxy Wearable; Samsung Health
ColorsBlack; WhiteTitanium Silver; Titanium Gray; Titanium White; Titanium Blue

Additional specifications

Additional specifications specifications comparison
SpecificationSamsung Galaxy Watch 8 ClassicSamsung Galaxy Watch Ultra 2025
Case materialStainless steelTitanium
Peak brightness3,000 nits peak—
Release statusAvailable. Released 2025, July 25Available. Released 2024, July 24
Model numbersSM-L500, SM-L505USM-L705F, SM-L705N, SM-L705U
Card slotNoNo
CameraNoNo
3.5 mm headphone jackNoNo
USBNoNo
RadioNoNo
2G bandsGSM 850 / 900 / 1800 / 1900GSM 850 / 900 / 1800 / 1900
3G bandsHSDPA 850 / 900 / 2100HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
4G bands1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 40, 66, 711, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 40, 66, 71
Network speedHSPA, LTEHSPA, LTE
SAR (US)1.04 W/kg (head) 0.41 W/kg (body)—
SAR (EU)0.03 W/kg (head) 0.67 W/kg (body)0.11 W/kg (head) 0.36 W/kg (body)
Additional durability featuresRotating bezel—

Similarities

  • Both have 2 GB RAM.
  • Both are rated IP68.
  • Both have NFC.
  • Both take calls over Bluetooth.
  • Both have OLED displays.
  • Both support eSIM.

In summary

For most buyers the Samsung Galaxy Watch Ultra 2025 is the better buy; the Samsung Galaxy Watch 8 Classic makes sense if you want a slimmer build.

Back to compared products ↑

In-stock alternatives

OnePlus Watch 4For Samsung Galaxy Watch 8 ClassicOnePlus Watch 4View product ↗Amazfit Balance 2For Samsung Galaxy Watch 8 ClassicAmazfit Balance 2View product ↗Google Pixel Watch 4For Samsung Galaxy Watch Ultra 2025Google Pixel Watch 4View product ↗Samsung Galaxy Watch UltraFor Samsung Galaxy Watch Ultra 2025Samsung Galaxy Watch UltraView product ↗

Related comparisons

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