# Which swimming fitness tracker offers the most accurate heart rate monitoring? — Verified Specification Comparison

> All specification data verified from official manufacturer documentation.

Which swimming fitness tracker offers the most accurate heart rate monitoring?

## Products

### Polar Verity Sense
```yaml
product: polar-verity-sense
brand: Polar
price_gbp: 68.76
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
water_resistance: 50 m suitable for bathing and swimming
heart_rate_monitor: Optical heart rate sensor with 6 LED lights
pool_length_settings: Set default pool length in the Polar Flow app
swim_distance_tracking: Yes, automatic pool distance tracking using detected turns
```

- **Price:** £68.76 [^1]
- **Summary:** The Polar Verity Sense is a lightweight optical heart rate sensor that records heart rate, distance and pace during pool swimming. Its 50 m water resistance, swimming goggle clip and arm strap suit swimmers and multisport athletes who want wrist-free training data.
- **Ideal For:** It suits swimmers seeking accurate heart rate monitoring because its 6-LED optical sensor can record heart rate underwater while the goggle clip keeps it securely positioned at the temple.

### Garmin HRM 600 Heart Rate Monitor
```yaml
product: garmin-hrm-600-heart-rate-monitor
brand: Garmin
price_gbp: 118.3
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
water_resistance: 5 ATM
heart_rate_monitor: Records and stores heart rate data while swimming
calories_burned_tracking: true
```

- **Price:** £118.3 [^2]
- **Summary:** The Garmin HRM 600 is a rechargeable chest-strap heart rate monitor with real-time heart rate and HRV transmission, standalone activity recording, and a 5 ATM water rating. It suits athletes who want accurate training data across running, cycling, swimming, and other activities, including workouts where wearing a watch is impractical.
- **Ideal For:** It suits swimmers seeking accurate heart rate monitoring because its chest-strap sensor records and stores heart rate data underwater, then syncs it to a compatible Garmin device after the swim.
- **Additional Sources:** [^3]

### COROS COROS HR Monitor
```yaml
product: coros-coros-hr-monitor
brand: COROS
price_gbp: 58.41
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
water_resistance: 3 ATM
heart_rate_monitor: Multi-channel optical sensor
```

- **Price:** £58.41 [^4]
- **Summary:** The COROS HR Monitor is an upper-arm optical heart rate sensor with a multi-channel sensor, automatic wear detection, Bluetooth connectivity, and up to 38 hours of operation. It is designed for runners, cyclists, and multisport athletes, but it is not suitable for swimming or water sports.
- **Ideal For:** It suits athletes seeking accurate heart rate monitoring because its multi-channel optical sensor is worn securely on the upper arm, where COROS says it can provide accuracy equivalent to a traditional chest strap.
- **Additional Sources:** [^5]

### Garmin Garmin Swim 2
```yaml
product: garmin-garmin-swim-2
brand: Garmin
price_gbp: 184.84
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
stroke_count: Yes
water_resistance: 1.5 metres
heart_rate_monitor: Underwater wrist-based heart rate monitor
pool_length_settings: User-entered pool length
swim_distance_tracking: true
calories_burned_tracking: true
```

- **Price:** £184.84 [^6]
- **Summary:** The Garmin Swim 2 is a GPS swimming smartwatch that tracks pool and open-water workouts, including distance, pace, stroke count, stroke type, calories, and SWOLF. It suits fitness swimmers, competitive swimmers, and open-water swimmers who want dedicated swim metrics with underwater heart-rate monitoring.
- **Ideal For:** It suits swimmers seeking accurate heart-rate monitoring because it includes an underwater wrist-based heart-rate monitor that records heart rate during swim activities, alongside detailed stroke and distance metrics.

---
## References & Sources
[^1]: WatchesOnline, accessed 2026-09-03. https://www.watchesonline.com/polar-verity-sense-optical-heart-rate-sensor-black-m-xxl
[^2]: Heart Rate Monitors USA, accessed 2026-09-03. https://www.heartratemonitorsusa.com/products/garmin-hrm-600
[^3]: Best Buy, accessed 2026-09-03. https://www.bestbuy.com/product/garmin-hrm-600-heart-rate-monitors-m-xl-black/JXF9YFFYR6
[^4]: REI, accessed 2026-09-03. https://www.rei.com/product/232714/coros-heart-rate-monitor
[^5]: COROS Nordic, accessed 2026-09-03. https://corosnordic.com/products/coros-heart-rate-monitor
[^6]: Best Buy, accessed 2026-09-03. https://www.bestbuy.com/product/garmin-swim-2-smartwatch-42mm-fiber-reinforced-polymer-slate-2019/JXF9YFQH4L/