Customer reviews from Garmin
Garmin - Index Sleep Monitor Size: L/XL - Black - (2025)
Average customer rating
3.3
(174 Reviews)
Rating breakdown 174 reviews
5 Stars
52
4 Stars
41
3 Stars
29
2 Stars
18
1 Star
34
Customer Reviews for Garmin - Index Sleep Monitor Size: L/XL - Black - (2025)
Customer Rating
4
Very comfortable HW - Addl SWFunctionality needed
on May 5, 2026
Posted by: Jon Paul
Epix gen 2 owner and the Sleep Monitor is much more comfortable to wear at night - it does its job well.
Would love to see some new features added
* In addition to setting alarms for specific times, would love to see the ability to set alarms for specific amounts of time - say 30 min for a nap, or 8 hours regardless of what time it is when I go to bed. (Thinking out loud - not just by wake-up time (7am) or length of time (8 hours), but by sleep need - Garmin connect has the information so why can't you determine when the user falls asleep and then calculate the right time to wake up?)
* Would love to see quick alarms that you can set once and then disappear after the alarm goes off - not every alarm needs to be saved.
* In addition to setting alarms for specific times, would love to see the ability to set alarms for specific amounts of time - say 30 min for a nap, or 8 hours regardless of what time it is when I go to bed. (Thinking out loud - not just by wake-up time (7am) or length of time (8 hours), but by sleep need - Garmin connect has the information so why can't you determine when the user falls asleep and then calculate the right time to wake up?)
* Would love to see quick alarms that you can set once and then disappear after the alarm goes off - not every alarm needs to be saved.
Written by a customer while visiting Garmin
Customer Rating
4
Helps
on May 6, 2026
Posted by: Ruko
was curious about what time i wake in the middle of the night and my breathing, and the length of sleep time..
Written by a customer while visiting Garmin
Customer Rating
2
Comfortable but Too Inconsistent to Recommend
on May 8, 2026
Posted by: Mehc
Bought the Garmin Index Sleep Monitor because I wanted to track sleep without wearing a watch and stay in the Garmin ecosystem (otherwise I probably would have gone with the Oura Ring).
Unfortunately, my experience has been disappointing so far. Pretty often the sleeve fails to record sleep entirely. I pay attention to fit, sensor position, placement, etc., and I still end up with a couple of failed nights per week.
The most frustrating part is the lack of meaningful feedback when it fails — there’s little to no explanation about what went wrong, so it’s hard to improve consistency.
To be fair, it’s very comfortable and unobtrusive when it works, which is exactly what I wanted. But in my case the reliability just hasn’t been there. Overall I’m disappointed and, based on my experience, I wouldn’t recommend it.
Written by a customer while visiting Garmin
Customer Rating
3
Good device, could use some additional features.
on May 12, 2026
Posted by: peterp
In general, I like the Index Sleep Monitor as it is more comfortable than wearing my Approach S70 watch while sleeping. One slightly annoying thing is that it takes a lot longer to sync its data to the Connect phone app in the morning compared to the watch. It would be even more useful if you could add the feature of getting notifications from my iPhone like the watch. I am hard of hearing and can hardly hear anything when I take my hearing aids out to sleep. It would be great for the sleep monitor to vibrate when I get a phone or facetime call on my phone.
Written by a customer while visiting Garmin
Customer Rating
1
Failed Product
on May 21, 2026
Posted by: brettrf
I've had the sleep monitor for a week - and it has not once gathered sleep data. 2/7 nights it collected heart rate - which my watch could already do. I have experimented with syncing, turning off my water, etc - nothing has worked. The sleep monitor issues are part of a larger weakness in the Garmin eco system.
I am probably a couple days from sending it back. The device should be pretty simple - gather data from a direct reading and send it to the paired phone. If you are looking for a product that does what it advertises with no hassle - this is not for you.
Whence someone figures this out - I will gladly delete this review.
Written by a customer while visiting Garmin
Customer Rating
3
?
on May 26, 2026
Posted by: Nonejjjjj
Not as accurate as I would have thought. I know that I was awake the other night, but the monitor indicated I was asleep the whole night.
Written by a customer while visiting Garmin