
How did you sleep? Find out with the Index Sleep Monitor. Comfortable, lightweight and worn on the upper arm, this smart sleep band can capture sleep-tracking and recovery metrics — including sleep score, sleep stages and HRV status — so you can better understand how your body recovers each night (data presented is intended to be a close estimation of metrics tracked). Using skin temperature, advanced women’s health tracking can provide 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 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. Plus, get up to 7 nights of battery life.
Q: Does this sleep monitor provide a sleep score?
A: Yes, the Index Sleep Monitor provides a sleep score.
Q: Can this sleep monitor track breathing variations?
A: Yes, the sleep monitor tracks breathing variations using Pulse Ox.
Q: Does this sleep monitor sync data wirelessly?
A: Yes, this sleep monitor uses bluetooth for wireless connectivity.
Q: What operating systems is this sleep monitor compatible with?
A: This sleep monitor is compatible with iPhones.
Q: Is there an app that this sleep monitor syncs with?
A: Yes, this sleep monitor seamlessly syncs your data with the Garmin Connect smartphone app.
Q: What metrics are measured by this sleep monitor?
A: This sleep monitor measures the duration of sleep stages.
Q: Is this sleep monitor rechargeable?
A: Yes, this sleep monitor is rechargeable.

How did you sleep? Find out with the Index Sleep Monitor. Comfortable, lightweight and worn on the upper arm, this smart sleep band can capture sleep-tracking and recovery metrics — including sleep score, sleep stages and HRV status — so you can better understand how your body recovers each night (data presented is intended to be a close estimation of metrics tracked). Using skin temperature, advanced women’s health tracking can provide 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 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. Plus, get up to 7 nights of battery life.

How did you sleep? Find out with the Index Sleep Monitor. Comfortable, lightweight and worn on the upper arm, this smart sleep band can capture sleep-tracking and recovery metrics — including sleep score, sleep stages and HRV status — so you can better understand how your body recovers each night (data presented is intended to be a close estimation of metrics tracked). Using skin temperature, advanced women’s health tracking can provide 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 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. Plus, get up to 7 nights of battery life.

Extend your prime for years to come with WHOOP—the only wearable that turns comprehensive health insights into daily action. There’s a WHOOP membership for every goal. On WHOOP Peak, get health and longevity insights to help you perform at your peak for longer. With 24/7 data collection and 14+ days of battery life, WHOOP continuously monitors your metrics, then customizes coaching based on your unique physiology. Quantify the impact of 160+ behaviors, monitor your key vitals, pinpoint your stressors, and slow your Pace of Aging with Healthspan.* Align your daily habits with your long-term health goals on WHOOP Peak.

Know the real you with the vívoactive 5 smartwatch, the ultimate on-wrist coach designed to support your goals — whatever they may be. Featuring a bright, colorful AMOLED display and up to 11 days of battery life, this GPS smartwatch is purpose-built with essential health and fitness features to help you better understand your body. Body Battery energy monitoring helps you keep your energy levels in check with personalized insights based on sleep, naps, stress, workouts and more. Improve the quality of your sleep with personalized sleep coaching and nap detection plus even more details such as HRV status (data presented is intended to be a close estimation of metrics tracked). During the day, switch up your activities with more than 30 built-in sports apps — including apps for active wheelchair users — plus advanced training features to keep you going strong. When paired to your smartphone, vívoactive 5 makes it easy to receive texts, emails and other smart notifications right from your wrist. Plus, enjoy connectivity features such as music storage, Garmin Pay contactless payments and more.
| Pros for Garmin - Index Sleep Monitor Size: L/XL - Black - (2025) | |||
|---|---|---|---|
| There were no pros for this product— | Comfort | Overall Performance, Comfort, Battery Life, Tracking Accuracy, Design | Battery Life, Overall Performance, Sleep Tracking, Ease of Use, Weight |
| Cons for Garmin - Index Sleep Monitor Size: L/XL - Black - (2025) | |||
| There were no cons for this product— | There were no cons for this product— | There were no cons for this product— | Band Comfort, Connectivity, Button Quality, Step Counter |
The vast majority of our reviews come from verified purchases. Reviews from customers may include My Best Buy members, employees, and Tech Insider Network members (as tagged). Select reviewers may receive discounted products, promotional considerations or entries into drawings for honest, helpful reviews.
I am heavily invested into the Garmin ecosystem (Epix Gen 2, Edge Explore 2, Index S2) and like to keep all my metrics in one place. Honestly, when the Index Sleep Monitor was released I was not that excited as I had hoped for a whoop like band with all day tracking. However, I wanted to add the sleep monitor for more *accurate Body Battery results. The band is comfortable but I must move around a lot as it has slipped off a few times. I did the sizing as suggested by Garmin and even tried doing it tighter. In terms of sleep data, it's not as good as my Oura Gen 3 (which honestly isn't that good either). The insight provided is also not very useful. If I could sync my Oura data to Garmin Connect I probably wouldn't use the index sleep monitor. If you don't have any other sleep trackers and are already in the Garmin ecosystem it might be worth it but if you have already have a sleep tracker I would probably pass on this.
Anon Posted
Do not waste your money on this piece of garbage. It seems to just give random sleep scores and is way less accurate than Garmin watches. Also, had multiple nights that wouldn’t sync with my watch or the app in the morning. I used it for two weeks and finally gave up on it. I waited too long and now it is past the return period so I guess it’s going the trash. Zero stars.
Michael Posted
Very comfortable with reasonable accurate metrics. The alarm must set each day and only setup and activated through the garmin app. Otherwise the alarm is nice way to wake up. Best thing is it is not invasive - like a watch - you dont notice it’s there!!
Avghomeowner Posted