Garmin Fenix 8 vs Apple Watch Ultra 3: which fitness wearables should you pick?
Our independent head-to-head from the 2026 edition of Best Fitness Wearables.
Garmin Fenix 8
The best-in-class multisport watch for serious athletes.
9.3/ 10
Apple Watch Ultra 3
The best general-purpose smartwatch, now a credible athlete watch.
9/ 10
Head-to-head
| Garmin Fenix 8 | Apple Watch Ultra 3 | |
|---|---|---|
| Our score | 9.3/10 | 9/10 |
| Pricing | $899–$1,199 | $799 |
| Best for | Endurance and multisport athletes | iPhone users who want one device for everything |
| Platforms | iOS, Android | iOS |
Pros & cons
Garmin Fenix 8 pros
- Best GPS accuracy we measured
- 2+ week battery life
- Maps, navigation, and training load are class-leading
- No subscription needed
Garmin Fenix 8 cons
- Expensive upfront
- Smartwatch features trail Apple Watch
Apple Watch Ultra 3 pros
- Best ecosystem
- Excellent sleep + HR + ECG
- Surprisingly competent for triathlon
Apple Watch Ultra 3 cons
- iOS only
- Battery still trails Garmin
Our verdict
Winner: Garmin Fenix 8. If training is the point, Fenix 8 is the device. The lack of subscription is meaningful – you're paying once.
In short
- Garmin Fenix 8 – If training is the point, Fenix 8 is the device. The lack of subscription is meaningful – you're paying once.
- Apple Watch Ultra 3 – If you have an iPhone and aren't a 100-mile-week athlete, this is the device.
See the full best fitness wearables ranking for every app in this category, or browse all head-to-heads.