Index Sleep Monitor

Name: Index Sleep Monitor
Brand: Garmin

ArmbandMid-rangereleased 2025

Key specs

Price

$169indicative US list price

Battery

7 dabout seven nights per charge, one review measured eight to nine

Display

No display

Water resistance

5ATM / 50m

GPS

None

Weight

30 g

Case size

S-M and L-XL bands

Works with

iOS + Android

Subscription

Not required · Garmin Connectfree, no paywall

not confirmed: whether it can feed Training Readiness on its own, sources disagree

What it tracks

Heart & vitals

Resting heart rateHigh accuracy

HRVHigh accuracy

Blood oxygen (SpO2)High accuracy

Respiratory rateHigh accuracy

Skin temperatureHigh accuracy

Sleep

Sleep durationHigh accuracy

Sleep stagesHigh accuracy

Sleep scoreHigh accuracy

Activity

CaloriesConsumer

Fitness

Energy / Body BatteryHigh accuracy

All-day stressHigh accuracy

Screening, not a medical diagnosis. This device offers SpO2. These are wellness screening features, not a substitute for a clinical evaluation.

Sources

https://www.garmin.com/en-US/p/index-sleep-monitor/
https://www.dcrainmaker.com/2025/06/garmin-index-sleep-monitor-in-depth-review.html

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