Apple Watch Series 9 vs Fitbit Versa 4
The Verdict
Apple Watch Series 9 and Fitbit Versa 4 target different user priorities. Series 9 offers superior display technology with a larger 45mm Always-On Retina LTPO OLED screen (484x396 resolution) versus Versa 4's smaller 40mm AMOLED display (336x336), plus faster Apple S9 SiP processor and cellular connectivity. However, Fitbit Versa 4 dramatically outperforms on battery life,6 days typical usage versus Series 9's 18 hours standard mode,making it ideal for users prioritizing longevity over ecosystem integration. Both include comprehensive health tracking (ECG, SpO2, skin temperature, sleep monitoring). Series 9's premium build, watchOS ecosystem, and NFC payments justify the $220 premium for Apple users; Versa 4 delivers exceptional value and endurance for budget-conscious fitness enthusiasts. Choose Series 9 for seamless iPhone integration and display quality; select Versa 4 if battery life and affordability matter most.
Who Should Buy
Buy the Apple Watch Series 9 if…
- →S9 chip enables on-device Siri and the new Double Tap gesture
- →Comprehensive health suite: ECG, SpO2, temperature, crash detection
- →Brightest Apple Watch display at up to 2000 nits
Buy the Fitbit Versa 4 if…
- →Best sleep tracking of any smartwatch — Daily Readiness Score
- →ECG, SpO2, and skin temperature at $179 is strong value
- →6-day battery life — charge once a week
Category Scores
Pros & Cons
Apple Watch Series 9
Pros
- S9 chip enables on-device Siri and the new Double Tap gesture
- Comprehensive health suite: ECG, SpO2, temperature, crash detection
- Brightest Apple Watch display at up to 2000 nits
- Seamless deep integration with iPhone and Apple ecosystem
- Wide variety of bands and cases for personalization
Cons
- 18-hour battery life requires daily charging
- Only useful if you own an iPhone — no Android support
- Cellular model adds significant ongoing carrier cost
- Incremental upgrade over Series 8 for existing owners
Fitbit Versa 4
Pros
- Best sleep tracking of any smartwatch — Daily Readiness Score
- ECG, SpO2, and skin temperature at $179 is strong value
- 6-day battery life — charge once a week
- NFC for Google Wallet contactless payments
- Google integration with Maps, Wallet, and YouTube Music
Cons
- Fitbit OS is being sunset — unclear future app support
- GPS accuracy is less reliable than Garmin or Apple Watch
- Limited third-party app ecosystem
- Physical button replaced with a haptic side button — divisive
Full Specifications
| Spec | Apple Watch Series 9 | Fitbit Versa 4 |
|---|---|---|
| Software | watchOS 10 | Fitbit OS (transitioning to Wear OS) |
| Body | ||
| Weight | 38.7 g (aluminum) | 37.6 g |
| Case material | Aluminum or stainless steel | Aluminum |
| Water resistance | WR50 / EN13319 | WR50 |
| Health & Sensors | ||
| ECG | ||
| SpO₂ | ||
| Skin temperature | ||
| Heart rate | ||
| Sleep tracking | ||
| Battery | ||
| Battery life | Up to 18 hrs, up to 36 hrs Low Power Mode | Up to 6 days (typical usage) |
| Display | ||
| Size | 45 mm | 40 mm (1.58 inches) |
| Type | Always-On Retina LTPO OLED | AMOLED |
| Always-on display | ||
| Resolution | 484 x 396 | 336 x 336 |
| Processor | ||
| RAM | 1 GB | — |
| Chipset | Apple S9 SiP | Fitbit proprietary |
| 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 9 or the Fitbit Versa 4.