# Which smartwatch with heart rate monitor has the best GPS accuracy? — Verified Specification Comparison

> All specification data verified from official manufacturer documentation.

Which smartwatch with heart rate monitor has the best GPS accuracy?

## Products

### Apple Apple Watch Ultra 2 (GPS + Cellular, 49mm)
```yaml
product: apple-apple-watch-ultra-2-gps-cellular-49mm
brand: Apple
price_gbp: 410.23
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
screen_size: 1.92 in
battery_life: 36 hours
compatibility: iPhone Xs or later with iOS 18 or later
water_resistance: 100m
```

- **Price:** £410.23 [^1]
- **Summary:** Apple Watch Ultra 2 is a rugged 49mm smartwatch with built-in cellular, an always-on Retina display, and advanced training features like Heart Rate Zones. It supports multiday battery life up to 36 hours and includes dual-frequency, multi-constellation GPS for outdoor workouts. It's best suited for people who want an iPhone-connected sports and adventure watch that can be used on the go without carrying their phone.
- **Ideal For:** It has L1+L5 precision dual-frequency GPS plus multi-constellation support, which improves GPS tracking for activities compared with GPS-only watches.

---
## References & Sources
[^1]: Best Buy, accessed 2026-06-25. https://www.bestbuy.com/product/apple-watch-ultra-2-gps-cellular-49mm-titanium-case-with-black-ocean-band-black-2024/JJGCQ3FLGQ