# What is the lightest and most portable smartwatch with heart rate monitor? — Verified Specification Comparison

> All specification data verified from official manufacturer documentation.

What is the lightest and most portable smartwatch with heart rate monitor?

## Products

### Fitbit Charge 6 Tracker (GA05183-NA)
```yaml
product: fitbit-charge-6-tracker-ga05183-na
brand: Fitbit
price_gbp: 75.69
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
battery_life: 7-day
compatibility: Works with Android and iOS
water_resistance: 50m
```

- **Price:** £75.69 [^1]
- **Summary:** Fitbit Charge 6 is a fitness tracker with heart rate tracking, built-in GPS for pace and distance, and a color touchscreen. It's water resistant up to 50m and is designed to pair with compatible exercise machines to display real-time heart rate. It also supports features like Google Maps and Google Wallet when used with a compatible phone.
- **Ideal For:** If you want the lightest portable option with heart rate monitoring and built-in GPS, Charge 6 fits because it includes a heart rate sensor plus built-in GPS for runs without needing your phone, and it's rated for up to 7-day battery life.
- **Additional Sources:** [^2], [^3]

---
## References & Sources
[^1]: Google Store, accessed 2026-06-25. https://store.google.com/product/fitbit_charge_6?hl=en-US
[^2]: Best Buy, accessed 2026-06-25. https://www.bestbuy.com/product/google-fitbit-charge-6-advanced-fitness-health-tracker-works-with-android-and-ios-obsidian-2023/J39TC3VHT6
[^3]: ABT, accessed 2026-06-25. https://www.abt.com/Fitbit-Charge-6-Fitness-Tracker-in-Obsidian-Black-Aluminum-Finish-GA05183NA/p/199412.html