Garmin Index Sleep Monitor

Price: $169.99 - $139.99
(as of Sep 16, 2026 05:16:37 UTC – Details)

From the manufacturer

The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. Index Sleep Monitor

Worn on the upper arm, this lightweight and breathable smart sleep band is available in two sizes for comfort throughout the night. Physical size: Sleep Band S-M: 12.8″ x 2.5″ x 0.02″ (326 x 63.5 x 0.55 mm)
Can provide sleep-tracking metrics, including sleep score, sleep stages, HRV and duration of rest (data presented is intended to be a close estimation of metrics tracked)
Up to 7 nights of battery life
For more insight into your health, the breathing variations feature uses Pulse Ox to check your level of variations while sleeping (this is not a medical device and not intended for diagnosing or monitoring medical conditions; Pulse Ox is required and not available in all countries)
Using skin temperature, advanced women’s health tracking provides more insight into your menstrual cycle, including better period predictions and past ovulation estimates (this feature is not intended to support conception, contraception or birth control and is not a medical device)
If you don’t own a Garmin smartwatch, Index Sleep Monitor sleep metrics can sync directly to the Garmin Connect app ; if you wear a compatible Garmin smartwatch during the day, your data will seamlessly sync via the Garmin Connect app for more insight into your health and fitness
Smart wake alarm gently vibrates to wake you at the optimal time
Customers find the sleep monitor extremely comfortable and appreciate its sleep statistics breakdown, though some report it fails miserably at tracking sleep. The device receives mixed feedback about its performance, with some finding it excellent while others consider it the worst Garmin product, and connectivity issues are common as customers struggle to sync data on the app. The accuracy and battery life are also mixed aspects, with some finding it accurate and reporting 6-7 days of battery life, while others report poor accuracy and difficulty with charging.