Customer reviews from Garmin
Garmin - Index Sleep Monitor Size: S/M - Black - (2025)
Average customer rating
3.3
(193 Reviews)
Rating breakdown 193 reviews
5 Stars
56
4 Stars
43
3 Stars
34
2 Stars
22
1 Star
38
Customer Reviews for Garmin - Index Sleep Monitor Size: S/M - Black - (2025)
Customer Rating
5
Does what it says
on August 10, 2025
Posted by: Sean_SEEN
This defiantly fills a need for me, but I can see how it wouldn't be as useful to everyone. For me it's great because if I wear my watch too much my Eczema goes crazy. It doesn't matter how clean I keep myself and my watch or if I switch wrists at night. Also this is way way way more comfortable than my Fenix while sleeping. Sometimes I'll forget it's there while I'm waking up and making coffee. It's great to be able to charge the watch overnight while not losing data. It really doesn't do anything different than the modern watches. It has all the same stuff. It is nice to save a bit of battery with the watch, but still get full sleep stats including pulse-ox. The band is very comfortable, but I did have it come off one night. I still don't know how that happened, but now I just adjust it every night ad bedtime which takes half a second.
The alarm works quite well and wakes me up nicely. Two taps to snooze, four to stop or just get up and take it off.
The battery does last the whole week. It has some red led's that flash if the battery is low, but honestly in the morning I never notice that. If you pick it up and jiggle it the lights will flash as well. Today I got a popup in the connect app telling me the battery was low.
The only real downside I've noticed is that the morning report on my Fenix8 quit showing up. I don't know if this is because my sleep pattern has been erratic lately or because I'm using the Index Sleep. Also despite my phone and watch sitting right next to me all night, everything takes just a second to sync in the morning before everyone is on the same page.
I'd love to see better integration between the Garmin products. I also use the Index S2 scale and it would be nice to be able to just get up step on and see a little sleep report or something. It would also be nice to get the morning report in the connect app. Maybe someday this would integrate well with other products to regulate sleep temp, fan speed, sunrise alarm clocks.
Overall I think it's worth the cash but don't expect it to do anything more than what your fancy watch already does.
Written by a customer while visiting Garmin
Customer Rating
5
Must have for Garmin users
on August 9, 2025
Posted by: Bill92264
For anyone tracking their data 24/7, this is a gamechanger. Way more comfortable than a watch (I literally forget I’m wearing it), and seems to be more accurate as a sleep tracker. Worth every cent.
Written by a customer while visiting Garmin
Customer Rating
3
Fine, not amazing
on August 9, 2025
Posted by: tacos1123
So the device itself is pretty good. Easy to use, comfortable, doesn't annoy me like wearing a watch does at night.
What does bug me is that it doesn't always properly show sleep in Garmin Connect. Some days it'll say "Wear a device for 3 days to get performance metrics" even though I have been wearing the watch or Index Sleep at all times. Other times it'll show "recent sleep" but the last sleep doesn't show. It just inconsistent and devalues it.
Also, please stop using proprietary chargers.
Written by a customer while visiting Garmin
Customer Rating
3
Not sure...
on August 8, 2025
Posted by: Schnemann
I've been wearing it every night for over a week, and aside from an additional device on my arm im not sure it's doing anything differently than my watch has been doing for a few years.
Written by a customer while visiting Garmin
Customer Rating
3
The idea is there but…
on August 8, 2025
Posted by: Jpatt0105
I definitely like this option over wearing my watch at night. However, I find that the band slips off sometimes during the night. Additionally, I’m not impressed with the battery life. For only being used at night to monitor sleep, the next versions battery life has to be extended. As I said, the idea is there and Garmin makes great products.
Written by a customer while visiting Garmin
Customer Rating
5
Comfortable for all night wear.
on August 8, 2025
Posted by: Phil J
I like this for the ease and comfort of the device application and metrics obtained. The battery life is excellent, but Garmin is particularly known for the longevity of its batteries. This is just another addition to the long line of Garmin products I own, and I am happy to add it to my collection of wearable health devices.
Written by a customer while visiting Garmin
Customer Rating
3
More comfortable than wearing a watch to bed!
on August 8, 2025
Posted by: Anonymous
The sleep monitor is much more comfortable than wearing a watch to bed. The strap is the most comfortable strap that I have ever worn on my bicep. It was so comfortable, I bought extras for other devices that I am testing.
I do have some concerns about the data compared to wearing my FR265 at night after the first 10 days wearing the device. The HRV readings overnight using the Index have averaged in the mid 60s, but my FR265 was consistently in the mid 70s (my Apple Watch records in the 70s & 80s), so Garmin connect has been showing that my HRV status is low because of this. My resting heart rate has also slightly increased 3-5bpm using the Index. My 3/5 rating of the device is based on these concerns about accuracy compared to the FR265.
The sleep times wearing the device have been within a few minutes of my Apple Watch sleep times. I don't pay too much attention to the sleep stages though. I am not convinced that they are too accurate on any wearable device.
I have tried to wear the device all day to see if it could be a legitimate Whoop competitor to wear at all times when I am not wearing my Forerunner 265, but it falls short because it does not record steps (which makes no sense because the device surely has an accelerometer) or intensity minutes. It does continue to record your heart rate whenever you are wearing it, but it will miss some of the higher spikes of heart rate if you wear it during the day while doing intense exercise. It does work if these things don't bother you, but keep in mind that the device is not designed to wear 24x7.
Written by a customer while visiting Garmin
Customer Rating
1
Garmin Size
on July 26, 2025
Posted by: GarminFanBoy
Garmin needs to include sizing the m/s was too small for 12.5inch arm
Written by a customer while visiting Garmin