Apple Watch Series 8 vs Samsung Galaxy Watch Ultra
The Verdict
Apple Watch Series 8 delivers polished performance and seamless iPhone integration at $399, while Samsung Galaxy Watch Ultra costs $650 and targets endurance athletes. Both offer identical health sensors including ECG, SpO2, and skin temperature monitoring, plus excellent sleep tracking. Samsung's Ultra dominates battery life with up to 60 hours in Power Saving mode versus Apple's 18 hours standard (36 with Low Power Mode). The Ultra's titanium build, 3000-nit AMOLED display, and MIL-STD-810H durability rating suit rugged outdoor use far better than aluminum construction. However, the Series 8's 32-38.8g weight provides superior daily comfort compared to Ultra's hefty 60.5g frame. Apple's watchOS 9 ecosystem remains tighter for iPhone users, offering deeper notifications and Siri integration, while Samsung's Wear OS 5 suits Android users but historically lags in responsiveness. The Series 8 represents better value for general users and fitness tracking, whereas Ultra justifies its $250 premium for adventure enthusiasts wanting multi-day battery, durability, and larger 47mm display. iPhone users should pick Series 8; Android users needing rugged capability should consider Ultra.
Who Should Buy
Buy the Apple Watch Series 8 if…
- →Crash Detection and temperature sensing are genuinely useful safety features
- →Always-On LTPO display is bright and readable even outdoors
- →Dual-frequency L1+L5 GPS provides precise tracking in dense urban areas
Buy the Samsung Galaxy Watch Ultra if…
- →Premium titanium build with 10ATM water resistance and MIL-STD durability
- →Bright 3000-nit Super AMOLED display with sapphire crystal protection
- →Dual-frequency GPS (L1 + L5) for precise outdoor tracking
Category Scores
Pros & Cons
Apple Watch Series 8
Pros
- Crash Detection and temperature sensing are genuinely useful safety features
- Always-On LTPO display is bright and readable even outdoors
- Dual-frequency L1+L5 GPS provides precise tracking in dense urban areas
- ECG, SpO2, and skin temperature cover comprehensive health monitoring
- Low Power Mode extends battery to 36 hours for travel
Cons
- 18-hour standard battery still requires daily charging
- S8 chip is essentially identical to S7 — minimal performance upgrade
- Stainless steel model pushes price to $699+
- Skin temperature sensing is limited to cycle tracking on launch
Samsung Galaxy Watch Ultra
Pros
- Premium titanium build with 10ATM water resistance and MIL-STD durability
- Bright 3000-nit Super AMOLED display with sapphire crystal protection
- Dual-frequency GPS (L1 + L5) for precise outdoor tracking
- Big 590 mAh battery delivers up to 100 hours in Power Saving mode
- Customizable Quick Button for fast access to workouts and apps
Cons
- Very expensive at $649 — Samsung's priciest watch yet
- Only one 47mm size, too large for smaller wrists
- BioActive sensor and BP/ECG features require Samsung phone
- Design closely mimics Apple Watch Ultra
- Limited third-party app ecosystem versus Apple Watch
Full Specifications
| Spec | Apple Watch Series 8 | Samsung Galaxy Watch Ultra |
|---|---|---|
| Software | watchOS 9 (upgradable to watchOS 11+) | Wear OS 5 with One UI Watch 6 |
| Body | ||
| Weight | 32 g (41mm Al) / 38.8 g (45mm Al) | 60.5 g |
| Case material | Aluminum / Stainless Steel | Titanium Grade 4 |
| Water resistance | WR50 (50m), EN13319 dive certification | 10ATM + IP68 + MIL-STD-810H |
| Health & Sensors | ||
| ECG | ||
| SpO₂ | ||
| Skin temperature | ||
| Heart rate | ||
| Sleep tracking | ||
| Battery | ||
| Battery life | Up to 18 hours (36 hrs in Low Power Mode) | Up to 60 hours in Power Saving mode (590 mAh) |
| Display | ||
| Size | 41mm / 45mm | 47mm (1.5") |
| Type | LTPO OLED Always-On Retina | Super AMOLED with Sapphire Crystal glass, up to 3000 nits |
| Always-on display | ||
| Resolution | 352 x 430 / 396 x 484 | 480 x 480 |
| Processor | ||
| Chipset | Apple S8 SiP | Samsung Exynos W1000 (3nm, 5-core) |
| RAM | — | 2 GB |
| Connectivity | ||
| GPS | ||
| NFC | ||
| Wi-Fi | ||
| Cellular | ||
| Bluetooth | 5.3 | 5.3 |
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This comparison is based on verified manufacturer specifications covering display, performance, camera, battery, and build quality. Scores are generated by analyzing specs across weighted categories on a 10-point scale. Learn more about our methodology.
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