Choosing the Right Fitness Tracker: Insights from Testing Four Top Smartwatches
"What’s going on here?” my coach exclaimed as he noticed I was adorned with four different smartwatches before heading out for a run. It's not unusual for me to wear two during workouts to compare metrics, but four? That definitely raised some eyebrows. As I explained that I was testing the watches for this article, he chuckled, calling my job fun. And indeed, the findings could offer valuable insights for anyone in the market for a smartwatch this year.
Throughout the past week, I wore four different smartwatches during sleep, various runs in preparation for a Spartan Beast, and a full 5K Spartan race. Here’s how each performed across these key testing grounds.
Evaluating Sleep Metrics
Sleeping with four smartwatches isn’t something I’d recommend, but surprisingly, it was more tolerable than expected. Each device gathered sleep data, yet their approaches differed significantly. For instance, the Samsung Galaxy Watch Ultra 2 included a unique skin temperature measurement, establishing a baseline over the two weeks it gathered data.
| Metric | Samsung Galaxy Watch Ultra 2 | Honor Watch 6 | Amazfit T-Rex 3 Pro | OnePlus Watch 3 43mm |
|---|---|---|---|---|
| Sleep time | 6h 33m | 6h 38m | 6h 43m | 6h 31m |
| Sleep score | 72 | 77 | 54 | 70 |
| Deep sleep | 1h 3m | 2h 24m | 1h 17m | 1h 2m |
| Light sleep | 2h 36m | 2h 48m | 3h 8m | 3h 47m |
| REM sleep | 2h 2m | 1h 26m | 1h 22m | 1h 42m |
| Times awake | 18 (52m) | 2 | 9 (38m) | 2 (7m) |
| Breathing quality | 12.9 times/min (high rate) | 63 (low score) | 14 BRPM | N/A |
| Heart rate range | 45-84 (51 avg) | 30-122ms HRV | 47-73 | 46-64 bpm (52 avg) |
| Blood Oxygen | 93% | N/A | 94% | N/A |
| Skin temperature | +1.3°F | N/A | N/A | N/A |
The Honor Watch 6 provided minimal analysis, presenting the data in percentages and overly simple ranges without any comprehensive detail. The OnePlus Watch 3 43mm had a better interface but fell short on certain metrics like blood oxygen levels. In contrast, the Galaxy Watch Ultra 2 excelled at overall data collection but seemed overly sensitive to my movements. Among the four, the Amazfit T-Rex 3 Pro delivered the most precise readings, aligning with my actual sleep disturbances far better than the others.
Assessing Running Performance
I’ve been training for a Spartan Beast, taking advantage of the Amazfit T-Rex 3 Pro's sophisticated running coach features, which I trust for accuracy in measurements. This pattern continued as I analyzed the results from my runs, comparing metrics across the four smartwatches.
Initially, the data looked comparably consistent, but a closer examination revealed discrepancies in GPS tracking. The OnePlus Watch 3 43mm recorded the least accurate path, which surprised me, given expectations. The Galaxy Watch Ultra 2 and Amazfit T-Rex 3 Pro delivered remarkably close results, while the Honor Watch 6 performed well but struggled in areas with tree cover, showing inaccurate positioning.
More detailed data highlighted the idiosyncrasies of each watch. For example, the Honor Watch 6 made significant errors in altitude readings, while the Galaxy Watch Ultra 2 faltered in cadence metrics. It’s interesting to see how the OnePlus Watch 3 43mm exhibited erratic speed readings, likely due to its GPS shortcomings. In terms of heart rate accuracy, however, all four watches performed similarly well, with the Amazfit T-Rex 3 Pro consistently providing reliable data throughout.
Final Spartan Race Performance
Competing in the Spartan Race, I selected both the Amazfit T-Rex 3 Pro and Samsung Galaxy Watch Ultra 2, since I could only wear two watches due to space constraints with the RFID tags required. Notably, the GPS data showed slight variances between the two, but neither exhibited significant discrepancies that would clearly indicate an outright winner.
If you zoom in on the comparative stats, it becomes clear that the Amazfit T-Rex 3 Pro maintained superior tracking during the race. In terms of heart rate measurements, the Galaxy Watch Ultra 2 presented some inconsistencies, particularly at crucial moments, suggesting it struggled during periods of physical exertion.
With the Spartan course's challenging obstacles, the Amazfit watch distinguished itself by accurately showing my heart rate even when waiting in line, while the Galaxy misread the activity altogether. That kind of mismatch can be frustrating and ultimately cements the T-Rex 3 Pro’s place as my fitness companion of choice.
The Best Smartwatch for Fitness Enthusiasts
After a thorough evaluation, the Amazfit T-Rex 3 Pro stays at the top of my list of smartwatches. With its mix of reliability and functionality over the past two years, it remains a favorite. Despite competition from several new models, its consistent performance and rich feature set continue to stand out.
The Zepp app enhances the experience with an intuitive interface and an array of impressive features, including an AI-powered food logging option. While a subscription provides deeper insights, it isn't a necessity for a fulfilling experience. For anyone passionate about fitness, the Amazfit T-Rex 3 Pro emerges as a top contender that promises to enhance any workout routine.
