The Best Sleep Aids and Trackers That Actually Help
From smart rings to white noise machines, we tested the sleep tools that are backed by evidence and worth the investment.
Sleep is the highest-leverage health intervention available — it affects everything from cognitive performance to immune function to longevity. The tools below have evidence behind them, have been tested by our team, and are worth the investment.
Best Sleep Tracker: Oura Ring Gen 3
The Oura Ring is the most accurate consumer sleep tracker we’ve tested, period. In independent studies, it correctly identifies sleep stages 79% of the time — comparable to research-grade devices costing ten times more. The morning Readiness Score synthesizes HRV, resting heart rate, and sleep quality into a single number that genuinely predicts how you’ll perform. Most users report behavior change within the first month of wearing it.
Keep Your Coffee the Right Temperature: Ember Mug 2
The single most evidence-backed sleep improvement is avoiding caffeine after 2pm. If you struggle with this, the Ember Mug makes your morning coffee last long enough that you won’t reach for an afternoon cup — the 80-minute battery hold means your 7am pour-over is still warm at 8:20am.