Polar H9
Score: 83/100
Garmin Forerunner 55
Score: 80/100Rankings
The Polar H9 is a chest-mounted ECG heart-rate sensor offering exceptional accuracy and a 400-hour battery life. Its main trade-off is the lack of onboard storage and reliance on a replace-once coin cell battery. Ideal for athletes who need precise data across multiple sports and appreciate dual-protocol connectivity.
The Garmin Forerunner 55 is an entry-level GPS running smartwatch offering up to two weeks of battery life and a lightweight 37 g design. It lacks advanced sensors such as SpO₂ and music playback, focusing on core running features. Best for beginner and recreational runners who prioritize simplicity and endurance.
| Attribute | | |
|---|---|---|
400 hoursbest | 336 hours | |
| ↓ lower better | 60 g | 37 gbest |
— | 1.04 inbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Battery & Power(2) | ||
Battery Life (hours) | 400 hours | 336 hours |
Battery Type | CR 2025 | Lithium-ion |
Build & Design(3) | ||
Weight (g) | 60 g | 37 g |
Water Resistance (IP Rating) | IP68 | 5 ATM |
Strap Material | Polyamide/Polyurethane/Elastane/Polyester | Silicone |
General(1) | ||
Operating Temperature (°C) | -10 to 50 °C | -20 to 60 °C |
Products in the top-left offer the best value (high score, low price).
Editors and CrossFit-focused reviewers consider the Polar H9 the best-value chest strap, emphasizing its precise ECG tracking, dual-protocol connectivity, and underwater capability.
Professional reviewers consider the Forerunner 55 a well-rounded, budget-friendly entry-level running watch. They commend its long battery life, clear display, and reliable wrist-based heart-rate monitoring, while noting the lack of advanced sensors and limited data customization as trade-offs for its price point.
