Apple Watch Series 8 vs Fitbit Sense
The Verdict
Apple Watch Series 8 and Fitbit Sense both deliver comprehensive health tracking with ECG, SpO2, and skin temperature monitoring, but diverge significantly in execution. Apple's offering features a superior LTPO OLED display with always-on capability and higher resolution (352x430 or 396x484), powered by the capable S8 SiP with dual-frequency GPS for precise outdoor tracking. Battery life remains a weakness at 18 hours standard, though Low Power Mode extends this to 36 hours. Fitbit Sense compensates with exceptional longevity,6+ days per charge,using a simpler AMOLED display and custom processor. Build quality favors Apple with lighter aluminum construction (32-38.8g vs 45.9g) and deeper water resistance (50m vs 5ATM). For seamless iPhone integration, superior processing power, and display quality, Apple Watch Series 8 justifies its $100 premium. Fitbit Sense appeals to budget-conscious users prioritizing battery life and basic health metrics without ecosystem lock-in.
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 Fitbit Sense if…
- →Most comprehensive health sensor suite at launch — EDA, ECG, SpO2, skin temp
- →6+ day battery outlasts Apple Watch and Samsung Galaxy Watch
- →Built-in GPS for phone-free outdoor workouts
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
Fitbit Sense
Pros
- Most comprehensive health sensor suite at launch — EDA, ECG, SpO2, skin temp
- 6+ day battery outlasts Apple Watch and Samsung Galaxy Watch
- Built-in GPS for phone-free outdoor workouts
- Stress management score with EDA sensor is unique
- NFC for Fitbit Pay contactless payments
Cons
- Fitbit OS app ecosystem is very limited compared to watchOS/Wear OS
- Capacitive button is unreliable and frustrating to press
- Many advanced features require Fitbit Premium subscription ($10/mo)
- Google acquisition created uncertainty about Fitbit OS future
Full Specifications
| Spec | Apple Watch Series 8 | Fitbit Sense |
|---|---|---|
| Software | watchOS 9 (upgradable to watchOS 11+) | Fitbit OS |
| Body | ||
| Weight | 32 g (41mm Al) / 38.8 g (45mm Al) | 45.9 g |
| Case material | Aluminum / Stainless Steel | Aluminum |
| Water resistance | WR50 (50m), EN13319 dive certification | 5ATM |
| 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 6+ days |
| Display | ||
| Size | 41mm / 45mm | 40mm (1.58 inches) |
| Type | LTPO OLED Always-On Retina | AMOLED |
| Always-on display | ||
| Resolution | 352 x 430 / 396 x 484 | 336 x 336 |
| Processor | ||
| Chipset | Apple S8 SiP | Fitbit custom processor |
| Connectivity | ||
| GPS | ||
| NFC | ||
| Wi-Fi | ||
| Cellular | ||
| Bluetooth | 5.3 | 5.0 |
Related Comparisons
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.
Explore more in smartwatches, see all Apple products or all Fitbit products. View full details for the Apple Watch Series 8 or the Fitbit Sense.