Google Nest Hub 2nd Gen for $100: The second-generation Nest Hub uses radar to track your sleep, which means you don’t need to wear anything, but it also has a microphone to track snoring, sleep talking, and other nocturnal sounds. I love the Nest Hub on my nightstand for smart home controls, family photos, and listening to sleep sounds or podcasts in bed, but the sleep tracking consistently overestimated my REM phases and missed periods of wakefulness that other trackers recorded. When I used multiple trackers simultaneously, the Nest Hub was the outlier.

Muse S Gen 2 Headband for $400: This headband has sensors capable of tracking your brain activity, similar to an electroencephalogram (EEG), alongside an accelerometer and gyroscope, and a PPG sensor to measure heart rate and blood circulation. It’s chiefly a meditation aid designed to help you relax, but it can also track your sleep, recording your heart rate, respiration, time to fall asleep, and how much you moved around to give you an overall sleep score. Sadly, I found it uncomfortable to wear and often woke to discover the sleep tracking had failed, usually because I’d removed it in the night. It is also far too expensive.

Kokoon Nightbuds for $290: While combining earbuds with sleep tracking is a smart idea, I found wearing the Nightbuds made it harder for me to fall asleep. These tiny earbuds plug into a curved control unit designed to sit on the back of your head, and they’re relatively comfy since everything is covered in pliable silicone. The companion app plays meditations, soothing sounds, and sleep stories to help you drop off or drown out a snoring partner. You can also connect via Bluetooth to play your own content. The sleep tracking is limited, showing the familiar four phases, sleep efficiency, and consistency, but I often woke to find they had come off during the night and cut my sleep tracking short. I am about to test the Philips Sleep Headphones, but they appear to be a rebranded version of these.

Biostrap Kairos: This lightweight wrist-worn band has a PPG sensor and accelerometer to track your heart rate, respiration, and HRV. It tracks sleep broken into awake, light, and deep sleep (REM will be added soon), and combines your biometrics to give you a sleep score. It also surveys you each morning on sleep quality, and how refreshed you feel, plus asks about how you felt when you woke and before you went to sleep. It seems quite accurate, but it’s designed for researchers, medical staff, and organizations looking to monitor employee health or study the impact of new services or products, so is not available for most folks to buy.