Apple Watch Ultra 2 vs Fitbit Versa 4
Apple Watch Ultra 2 dominates with a massive 49mm LTPO2 OLED display reaching 3000 nits brightness, titanium construction rated WR100 with dive certification, and exceptional 36-72 hour battery life via watchOS 10's efficiency. Fitbit Versa 4 counters with a lighter 37.6g aluminum frame, impressive 6-day battery endurance, and comparable health sensors (ECG, SpO2, skin temperature) at a quarter the price. Ultra 2 excels for professional athletes and adventure enthusiasts needing rugged durability and premium features like cellular connectivity and superior display quality. Versa 4 suits casual fitness trackers prioritizing value and extended battery life without cellular overhead. For serious athletes willing to invest: Ultra 2. For budget-conscious fitness enthusiasts: Versa 4.
Full Specifications
| Spec | Apple Watch Ultra 2 | Fitbit Versa 4 |
|---|---|---|
| Software | watchOS 10 | Fitbit OS (transitioning to Wear OS) |
| Body | ||
| Weight | 61.4 g | 37.6 g |
| Case material | Titanium | Aluminum |
| Water resistance | WR100 (100m) + IP6X dust + EN13319 dive certified | WR50 |
| Health & Sensors | ||
| ECG | ||
| SpO₂ | ||
| Skin temperature | ||
| Heart rate | ||
| Sleep tracking | ||
| Battery | ||
| Battery life | Up to 36 hours normal use, up to 72 hours in Low Power Mode | Up to 6 days (typical usage) |
| Display | ||
| Size | 49mm | 40 mm (1.58 inches) |
| Type | LTPO2 OLED Always-On Retina, up to 3000 nits | AMOLED |
| Always-on display | ||
| Resolution | 502 x 410 | 336 x 336 |
| Processor | ||
| RAM | 1 GB | — |
| Chipset | Apple S9 SiP (64-bit dual-core) | Fitbit proprietary |
| Connectivity | ||
| GPS | ||
| NFC | ||
| Wi-Fi | ||
| Cellular | ||
| Bluetooth | 5.3 | 5.0 |
Category Scores
Pros & Cons
Apple Watch Ultra 2
Pros
- Extremely bright 3000-nit display readable in direct sunlight
- Rugged titanium case with MIL-STD certification and dive certification to 40m
- Best-in-class battery life for an Apple Watch at up to 36 hours
- Dual-frequency precision GPS (L1 + L5) for accurate tracking
- On-device Siri processing and double-tap gesture via Apple S9 chip
Cons
- Very expensive at $799 starting price
- Only one large 49mm case size, too big for smaller wrists
- Still requires daily charging for heavy users
- No blood oxygen feature on units sold in the US (post-ban)
- Locked into the Apple ecosystem, requires an iPhone
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
Related Comparisons
Explore more in smartwatches, see all Apple products or all Fitbit products. View full details for the Apple Watch Ultra 2 or the Fitbit Versa 4.