Here's how you can track sleep on your Garmin – without having to wear your Garmin
Garmin just released the Index Sleep Monitor. It's a smart band you wear on your upper arm instead of your smartwatch. It does all the same sleep tracking, so you're not missing out on anything.
Read more: Best Garmin watch in 2025 reviewed and rated
This thing isn't trying to replace your Garmin smartwatch during the day – it's more like its sleep sidekick. The Index Sleep Monitor quietly gathers all the data your wristwatch misses when you chuck it on the bedside table. You wear this band to bed, wake up, and have all your REM cycles, breathing patterns, skin temperature fluctuations, and other metrics neatly synced up in the Garmin Connect app. It can even nudge you awake during lighter sleep with a 'smart wake alarm.'
As someone who doesn't like wearing their smartwatch while sleeping, this is the first Garmin wearable in ages that I'd actually consider – if I had a Garmin watch, that is. It looks surprisingly unintrusive, sits on your upper arm, and looks a lot easier to wear. Garmin's even thought ahead and made the band machine washable, which is the kind of hygiene feature that should be standard.
Naturally, it also tracks the usual suspects: heart rate, blood oxygen, skin temperature, respiration, HRV, and stress levels. The sleep scores roll into Garmin's Body Battery system, which basically tells you how ready you are for the day. Temperature tracking can also play a role in estimating past ovulation and offering period predictions.
If you fancy slapping this new device on your arm, the Garmin Index Sleep Monitor is available now. You can get it in small-medium and large-extra large sizes for $170/£150.
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Pros Medical-grade measurements for a wide range of metrics Insights that actually teach you about your body Slick, intuitive app with seamless integrations Cons Requires a pricey annual subscription to use Only one specific band allows ECG and Heart Screener features Auto workout, step and VO2 Max readings aren't always reliable Whoop MG technical specifications Sensors PPG heart rate, ECG electrodes, accelerometer, skin-temperature sensor Compatibility iOS and Android (via Bluetooth LE) Durability IP68 (up to 10m) Battery life Approx. 14 days Subscription Whoop Life membership required ($359/£349 per annum) Dimensions 35x24x10mm, 27.3g
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