Garmin Index Sleep Monitor
A sleep-only armband that gives you Garmin’s overnight data without wearing a watch to bed.
Key specs
- Battery life
- 7 days
- Charging
- 1h 30m
- Weight
- 14.5g
- Display
- No screen
- Water resistance
- 5 ATM (50m)
- Phone
- iPhone or Android
- Sensors
- Optical heart rate, SpO₂, Skin temperature, Accelerometer
The Index Sleep Monitor exists for one kind of Garmin owner: the one who takes the watch off at night. It is a 14.5g module on a stretchy upper-arm band that tracks sleep stages and score, HRV status against a personal baseline, Pulse Ox, breathing variations, respiration, and skin temperature, then wakes you with a smart vibration alarm. The data lands in Garmin Connect and fills the overnight gap in a daytime watch’s Body Battery and HRV. It is not a Whoop. There is no screen and no daytime activity tracking, and Training Readiness still needs a Garmin watch to calculate it. Seven nights per charge with Pulse Ox on, a 5ATM module, and a band that goes in the washing machine. The new Cirqa, which also tracks your day, costs only $30 more.
Strengths
- Sleep, HRV status, Pulse Ox, and skin temperature without a watch at night
- Seven nights per charge with Pulse Ox on
- Washable band, 5ATM module, and a smart vibration alarm
Tradeoffs
- No daytime activity tracking and no screen
- Training Readiness still needs a Garmin watch
- Only $30 less than the Cirqa, which also tracks your day
Full specs
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Common questions
- How much does the Garmin Index Sleep Monitor cost?
- The Garmin Index Sleep Monitor has a list price of $169.99.
- Does the Garmin Index Sleep Monitor require a subscription?
- No. The Garmin Index Sleep Monitor has no subscription — you pay for the hardware once and the Garmin app is included.
- How long does the Garmin Index Sleep Monitor battery last?
- About 7 days of typical use per charge. Heavy GPS use, an always-on display, and continuous sensing all pull that number down.
- How much does the Garmin Index Sleep Monitor weigh?
- The Garmin Index Sleep Monitor weighs 14.5 g.
- Is the Garmin Index Sleep Monitor waterproof?
- The Garmin Index Sleep Monitor is rated 5 ATM (50m), which covers showering, swimming, and surface water sports. It is not a dive rating.
- Does the Garmin Index Sleep Monitor work with iPhone and Android?
- It pairs with both iPhone and Android.
- When was the Garmin Index Sleep Monitor released?
- Garmin released the Garmin Index Sleep Monitor in 2025, and it is still in the current lineup.