ELI5: How do sleep rings work

Sleep rings are like tiny detectives on your finger, tracking how well you sleep each night.

Imagine your body is a car. Sleep rings keep track of things like:

• How long the car is running (total sleep time).
• How fast the car is going at different times (sleep stages, like light sleep or deep sleep).
• How bumpy the road is (movement during sleep).
• How fast your engine is running (heart rate).

Here's how it works:

• You wear the sleep ring on your finger while you sleep.
• The sensors constantly collect information about your body.
• In the morning, the ring sends this information to your phone through Bluetooth, like a wireless message.
• The app on your phone turns the information into easy-to-understand charts and scores.

• How long you were in deep sleep, which is important for feeling rested.
• How many times you woke up during the night.
• If your heart rate was too high or too low while you were sleeping.