Customer reviews from Garmin
Garmin - Index Sleep Monitor Size: L/XL - Black - (2025)
Average customer rating
3.3
(223 Reviews)
Rating breakdown 223 reviews
5 Stars
66
4 Stars
48
3 Stars
38
2 Stars
29
1 Star
42
Customer Reviews for Garmin - Index Sleep Monitor Size: L/XL - Black - (2025)
Customer Rating
1
Not recommended!
on October 5, 2025
Posted by: Gogolinetto
I was looking forward to Garmin's sleep monitor since I don't like to wear my watch during the night. After trying it for almost two weeks I am dissappointed. Of twelve readings three are completely wrong. I slept 8 hours, but the monitor recorded only 2 hours or so, interestingly during a time when I didn't even wear the band. Manual correction didn't change anything, the sleep is saved forever as "poor".
What bothers me most is the fact that one cannot delete any data, so the average of my sleep shows to be much worse than it really is. The bad readings influence the training data, so it is really a problem. Garmin should at least allow to delete wrong readings if it is not able to sell a functioning tool. Considering the price I can only recommend to stay away from it - or buy some high class unit from another company!
What bothers me most is the fact that one cannot delete any data, so the average of my sleep shows to be much worse than it really is. The bad readings influence the training data, so it is really a problem. Garmin should at least allow to delete wrong readings if it is not able to sell a functioning tool. Considering the price I can only recommend to stay away from it - or buy some high class unit from another company!
Written by a customer while visiting Garmin
Customer Rating
1
Does not actually track sleep
on October 4, 2025
Posted by: josh123
The band has been very disappointing. If I wake up in the middle of the night it'll count it as the end of the sleep and not track sleeping for the rest of the night. Additionally it often fails to start when I fall asleep and seems to begin tracking an hour or so later than my watch. Overall an extreme disappointment for the price.
Response from GarminBy Garmin, Care, October 4, 2025
If you are wearing your watch and the Index Sleep Monitor at the same time then whatever device you have set as your primary wearable and training device is going to record sleep over the Index Sleep Monitor. I've linked an FAQ article for this below.
http://ms.spr.ly/6429sxQCV
http://ms.spr.ly/6429sxQCV
Written by a customer while visiting Garmin
Customer Rating
5
Super comfortable
on October 4, 2025
Posted by: Paulllllll
Been using for a week, cannot even notice that I'm wearing it. Best sleep tracker i have tried. Paired with a watch during the day provides all the data as any other wrist based or ring based device with better comfort.
Written by a customer while visiting Garmin
Customer Rating
4
Great sleep tracking.
on October 2, 2025
Posted by: Curt_fbo_mn
Sleep tracking appears to be more accurate than my Fenix 8 due to the band (and the Fenix 8 is great) of the the Index being tight consistently on my upper arm. On my 3rd week of using it. Syncs quickly in the morning. I have not had success with the on board alarm(s) working yet. I set the alarms for each day on the Garmin Connect application, but so far, I have not noticed them going off, and I have them set at the highest vibration rate. I wish the battery life was better, I'm getting about 5 to 6 days on a charge. The band is very comfortable, so comfortable I forget it's there! It uses the same charge cable design as other Garmin products (Fenix watches). The status lights are easy to understand regarding pairing and when the charge is complete.
Response from GarminBy Garmin, Care, October 2, 2025
If you're not feeling the alarm vibrations from your Index Sleep Monitor on the highest vibration setting, we'd like to see if we can help. Please call Garmin Support at 800-800-1020 so we can discuss this in further detail and troubleshoot this with you.
*KC
*KC
Written by a customer while visiting Garmin
Customer Rating
5
Super Happy with fit and info
on October 1, 2025
Posted by: Pudge831
Purchased the Index Sleep Monitor as I just cannot wear a watch in bed. The band is super comfortable and you don't notice it on at all. The data each day is nice to have and Garmin Connect allows you to add notes for each day as well. I am also using the new "Lifestyle" tracking in Garmin Connect as well to track certain daily activities. I would recommend this product.
Written by a customer while visiting Garmin
Customer Rating
1
Doesn’t work at all
on September 26, 2025
Posted by: Mcat1906
I tried this for 7 days. It was able to successfully log sleep on 3 of the 7 nights and only 2 of those 3 were accurate. I opened a support case with garmin and no one ever followed up. I returned it.
Written by a customer while visiting Garmin
Customer Rating
1
Sleep monitor and instinct 2 solar: not compatible
on September 23, 2025
Posted by: Pasitpon
I am somewhat disappointed by the incompatibility between these two devices. All data from sleep were recorded, but the body battery did not appear. I would like to inquire about the potential for future compatibility between these devices and the anticipated timeline.
Despite following the workaround recommended by Garmin-Tracy, the data synchronization was unsuccessful.
I am very disappointed with this outcome.
Written by a customer while visiting Garmin
Customer Rating
5
on September 23, 2025
Posted by: Jeff F
Very comfortable. Don't notice I'm wearing it to the point of having to remind myself to take it off in the morning. I could never stand sleeping with a watch or anything else on my wrist so this is perfect. Recording seems to be spot on also. One quick note is that nothing I found in the documentation tells you how to turn it on! It wakes up when you pick it up but if you then put it on it won't record. After waking it up you have to hold a finger over the HR optics and it will buzz twice. It is then ready to wear.
Written by a customer while visiting ExpertVoice.com
