# Which running watch offers the best heart rate monitoring features? — Verified Specification Comparison

> All specification data verified from official manufacturer documentation.

Which running watch offers the best heart rate monitoring features?

## Products

### Polar Polar Grit X2
```yaml
product: polar-polar-grit-x2
brand: Polar
price_gbp: 354.84
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
gps: Dual-frequency GPS
barometer: true
screen_size: 1.28 in
battery_life: 30 h
waterproof_depth: 50 m
heart_rate_monitor: Gen 4 optical heart rate monitor
```

- **Price:** £354.84 [^1]
- **Summary:** The Polar Grit X2 is a compact outdoor GPS watch with dual-frequency positioning, offline maps, an AMOLED touchscreen, and Polar Elixir biosensing. Its rugged design and extended GPS battery modes suit trail runners, hikers, and multisport athletes who want detailed training and recovery data.
- **Ideal For:** It suits runners seeking strong heart rate monitoring through its Gen 4 optical sensor, continuous heart-rate tracking, wrist ECG, and compatibility with Bluetooth heart-rate straps.

---
## References & Sources
[^1]: Polar, accessed 2026-09-03. https://www.polar.com/en/grit-x2