Customer reviews from Garmin
Garmin - Index Sleep Monitor Size: S/M - Black - (2025)
Average customer rating
3.3
(202 Reviews)
Rating breakdown 202 reviews
5 Stars
59
4 Stars
43
3 Stars
36
2 Stars
26
1 Star
38
Customer Reviews for Garmin - Index Sleep Monitor Size: S/M - Black - (2025)
Customer Rating
1
The Index Sleep Monitor is complete unusable
on August 11, 2025
Posted by: LifeOfPabs
I purchased the Index Sleep Monitor as an alternative to my Garmin Forerrunner 745 to track my sleep and because it advertised a smart alarm, which was one of the most essential features for me.
Upon receiving it, I watched videos to make sure I understood how it worked, read the material, and was confident in using this device to track my sleep and help me wake up at the optimal time.
For an entire week, I did not get an accurate reading of my sleep, and not once was I woken up by the smart alarm. Several nights, the tracker didn't record anything. So, after a week of trying to figure out why? I've switched back to my watch, which is more reliable.
Suggestions:
**Live Tracking**
Update Garmin Connect with the ability to live track data. Not being able to see if the device is actually tracking information is poor UX. While I can see the "Connected" label in the app, the fact that the device doesn't have a screen requires a simple way to see if it's tracking information.
**Live Tracking**
Update Garmin Connect with the ability to live track data. Not being able to see if the device is actually tracking information is poor UX. While I can see the "Connected" label in the app, the fact that the device doesn't have a screen requires a simple way to see if it's tracking information.
This would allow me to determine if I've positioned it incorrectly or if something else is causing the issue.
**Improved Sync With Other Garmin Devices**
The ecosystem forces the work on the user to ensure the devices are synced correctly. Turning off sleep tracking on the watch, setting up tracking on the band, etc.
The ecosystem forces the work on the user to ensure the devices are synced correctly. Turning off sleep tracking on the watch, setting up tracking on the band, etc.
This should be done for me. And it should be as intuitive as the moment I pair my device, it walks me through what I want to track, then sends the information to my app, which in turn updates my other Garmin devices without me having to do anything.
If you can't do that, then provide me with the step-by-step instructions on how to do it for each Garmin Device. Not a generic set of instructions like, "turn of sleep tracking."
I have been extremely disappointed in this product, because my expectations for it were so high. I truly want an intuitive way to track my sleep and wake up at the optimal time.
As a tech-enthusiast, this should be simple. Yet for me, it was unusable.
Written by a customer while visiting Garmin
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