Comparing Sleep Tracking: Garmin, Apple Watch, Oura Ring, and Whoop
Recent research aimed to evaluate the sleep tracking capabilities of popular wearable devices. The goal was to determine which devices best measure sleep stages, including deep sleep, light sleep, REM sleep, and times awake. This study monitored 18 participants over five nights under various sleep conditions, such as normal, restricted, recovery, and extended sleep.
Devices Tested
Participants used several devices, including:
- Apple Watch
- Oura Ring
- Whoop
- Fitbit
- Garmin
- Circle Plus Ring
- Sleep 2 app (University of Salzburg)
The research compared these devices against polysomnography, considered the gold standard for measuring sleep. This test records multiple physiological variables, such as brain activity and heart rate, leading to precise sleep assessments.
Top Performers in Sleep Tracking
The study identified three devices that excelled in accuracy:
- Oura Ring: Consistently performed well across all sleep stages, particularly in tracking REM and light sleep.
- Whoop: Almost matched the Oura Ring in performance, especially for REM and light sleep, but struggled with awake time detection.
- Apple Watch: Best at detecting awake time and showed good results for light and REM sleep, though it struggled with deep sleep accuracy.
Mid-Tier Competitors
Next in line were:
- Fitbit: Delivered decent results, particularly for REM sleep. However, its performance lagged behind the top three.
- Garmin: Consistently underperformed in comparison to leaders, especially in tracking REM sleep.
Underperformers
The study indicated that the Circle Plus Ring was the least reliable device, showing poor performance across all metrics.
Key Insights
Accuracy in sleep tracking varies from device to device. The study revealed the following:
- Oura Ring and Whoop excelled at detecting night-to-night variations in sleep stages.
- Apple Watch was most reliable for awake time but less consistent for deep sleep.
- Fitbit and Garmin showed more variability, with Fitbit performing better for REM sleep.
Every user’s experience may differ. Some found the Apple Watch highly accurate, while others noted it as less effective. Oura Ring showed varied results, with some users reporting excellent experiences and others having average outcomes.
Choosing the Right Device
When selecting a wearable primarily for sleep tracking, consider the following recommendations:
- For overall accuracy: Oura Ring or Whoop (new algorithm) are recommended.
- For awake-time detection: Apple Watch reigns supreme.
- For budget-conscious users: Keep an eye on Fitbit’s upcoming algorithm updates.
- Avoid: Circle Plus Ring based on the study’s findings.
While this study provides valuable insights, it is essential to acknowledge its limitations. The sample size was small, and participants with severe sleep disorders were not included. Therefore, findings may vary in a broader context.
