How Accurate Are Apple Watch Ultra 4 and Garmin Fenix 9 Pro Heart Rate Measurements?
Both the Apple Watch Ultra 4 and Garmin Fenix 9 Pro deliver highly accurate heart rate readings during exercise. In a 30-minute hilly run test with a chest-mounted ECG heart rate monitor as the benchmark, the average heart rates recorded were 160 bpm for Apple, 159 bpm for Garmin, and 158 bpm for the electrical monitor. Being within 2 beats per minute illustrates that these smartwatches reliably track heart rates close to professional ECG monitors, suitable for users who need precise fitness data.
What Are the Differences in Fitness Metrics and Data Processing?
Besides heart rate, calorie burn estimates from both watches were similar, around the high 300s, making either watch useful for tracking workout intensity. Note that chest heart rate monitors might provide different calorie estimates due to limited data inputs compared to wrist devices that integrate additional sensor data and user metrics.
Which Watch Offers Better Battery Life and Survival Features?
The Garmin Fenix 9 Pro excels for multi-day and extended outdoor activities with up to 10 days of battery life and survival features like an LED flashlight. This makes it ideal for adventurers needing long-lasting power and practical tools in remote settings.
In contrast, the Apple Watch Ultra 4 offers around 48 hours of battery life and features superior software and third-party app integration, delivering a better day-to-day smartwatch experience with more polished user interface and functionality, but requiring more frequent charging.
Which Smartwatch Should You Choose Based on Your Needs?
If you are a multi-day adventurer or endurance athlete valuing battery longevity and survival tools over smartwatch functionality, the Garmin Fenix 9 Pro is a better fit. It provides durable and reliable tracking for prolonged outings.
If you want a watch that balances accurate fitness tracking with advanced smartwatch capabilities for daily use and shorter excursions, the Apple Watch Ultra 4 offers superior software and user experience despite needing more frequent charging.