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QALO SR-2 Smart Ring
The thinnest, subscription free smart ring on the market.
$199.95
Choose your finishRose Gold
Sizing
QALO Slim Ring fits snug because of the raised sensors.
Not sure of your size? You can
Split your payment into 4 equal interest-free payments with
Bundle + Save 20%QALO SL-1 Smart Band
$199.95
[ - The App - ]
From a rough nightto a good day.
QALO Slim shows you what’s off, what to do about it, and when it’s working. One score each morning, one clear next step, and proof it’s paying off. All without a subscription.
The painA rough night shows up first
Five hours of sleep, and your Q Score says so. One number from your sleep, vitality and movement, so you know today calls for an easier pace.
First actionOne clear next step
Your goals show exactly what's left today. A short walk closes the gap, and it logs on its own.
First progressProgress you can see
The next night, your Sleep Score is up 22 points. Small changes show up in your scores, so you can see what's working.
Life lived healthyA good day, summed up
Sleep, vitality and movement back in range, and one number that shows it. No subscription to see it.
[ - Women's Health - ]
Your cycle,read for you.
SR-2 reads your temperature and heart data through all four phases, with no daily logging required. Built with input from OB-GYNs, included with no subscription.
- What's happening
- Hormones are at their lowest; energy often dips.
- What SR-2 sees
- Your period start, and a forecast of the next one.
- What to do
- Log cramps, flow and mood in a few taps, the month ahead isn't a guess.
![[Image Alt Placeholder]](https://cdn.shopify.com/s/files/1/0201/1744/files/phases-base-image.png?v=1794252271&width=100&crop=center)
Pregnancy Insights
Temperature, HRV and rest changes tracked across pregnancy.
Your data stays yours
Encrypted and stored on US servers, never sold or used for ads, you choose what’s shared.
Included
Every feature, every insight, with no subscription and no hidden paywall.
[ - Details - ]
Product Specification
QALO SlimTechnical Breakdown
Battery Life
- Up to 5 days of battery life with daily use
- USB-C charging case included
- Water resistant in fresh water to 1.5m for up to 30 minutes
- Ultra-lightweight titanium alloy, from just 2.5g
- Silicone covers included to protect against scratches
Health Tracking
- Advanced sensors continuously monitor key health metrics
- Tracks sleep, stress, movement and workouts
- Measures heart rate variability (HRV) and blood oxygen (SpO₂)
- Monitors skin temperature and women's health metrics
Wear & Care
- Suitable for running, cycling, hiking and everyday workouts
- Designed to withstand sweat and daily activity
- Remove during heavy weightlifting to prevent damage
- Avoid scuba diving and high-pressure water activities
- Keep away from open flames and extreme heat
Materials & Durability
- Ultra-lightweight titanium alloy construction
- Available in brushed gold and brushed silver
- Includes two protective silicone covers in black and white
- Water-resistant in fresh water up to 1.5 m for 30 minutes
- 25% thinner design for improved everyday comfort
Weight & Dimensions
- Width: 8.0 mm
- Thickness: 2.2 mm
- Weight: 2.5–3.1 g, depending on ring size
- Available in sizes 6–14
- Recommended for the index, middle or ring finger
- Sizing up from your usual ring size is recommended
Compatibility & App
- Compatible with iOS and Android devices
- Free access to the QALO app with no subscription fees
- Native Apple Health integration for activity, sleep and heart rate
- Health data stored securely in the United States
- Personal data permanently deleted upon account closure
*Please note: Battery life, charging times, and overall performance may vary depending on ring size, usage patterns, device settings, and environmental conditions.
Questions, answered
No. Pay once and get full app access, including complete women's health, forever.
[ - Customer Reviews - ]
278
Total reviews
4.78
Average rating
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[ - Compare - ]
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QALO SR–2
QALOSR–2
O*** Ring
O*** Ring
Price
$199.99
Price
Starting at $249
Subscription Fee
Free
Subscription Fee
$69.99/year
Dimensions
2.85mm / 2.9mm Thickness
Dimensions
Width: 3.51mm Thickness: 7.90mm
Heart Rate Monitoring
Periodically
(throughout the day)
Heart Rate Monitoring
Periodically
(throughout the day)
HRV Monitoring
(Tailored)
HRV Monitoring
Skin Temperature Tracking
(Tailored)
Skin Temperature Tracking
SPO₂
(Tailored)
SPO₂
Sleep Tracking
Sleep Tracking
Sleep Metrics
Comprehensive Sleep Stages Tracking
with 6+ Contributing Metrics
Sleep Metrics
Comprehensive Sleep Stages
Nap Detection
Nap Detection
Battery life
Up to 5 days
Battery life
Up to 7 days
Full charging time
60 minutes
Full charging time
80 minutes
Water Resistance
Up to 100 meters (about ~330 feet)
Water Resistance
Up to 100 meters (about ~330 feet)
Performance based streaks
Performance based streaks
Company Country of Origin
United States
Company Country of Origin
Finland
Location of Your Health Data
United States
Location of Your Health Data
Global
Personalized Style
Engravable, protective covers
Personalized Style
QALO SR–2
QALOSR–2
O*** Ring
O*** Ring
Price
$199.99
Starting at $249
Subscription Fee
Free
$69.99/year
Dimensions
2.85mm / 2.9mm Thickness
Width: 3.51mm Thickness: 7.90mm
Heart Rate Monitoring
Periodically
(throughout the day)
Periodically
(throughout the day)
HRV Monitoring
(Tailored)
Skin Temperature Tracking
(Tailored)
SPO₂
(Tailored)
Sleep Tracking
Sleep Metrics
Comprehensive Sleep Stages Tracking
with 6+ Contributing Metrics
Comprehensive Sleep Stages
Nap Detection
Battery life
Up to 5 days
Up to 7 days
Full charging time
60 minutes
80 minutes
Water Resistance
Up to 100 meters (about ~330 feet)
Up to 100 meters (about ~330 feet)
Performance based streaks
Company Country of Origin
United States
Finland
Location of Your Health Data
United States
Global
Personalized Style
Engravable, protective covers