# QALO SR-2 Smart Ring

The text version of the iDevice Guide at https://idevice.com/smart-rings/qalo-sr-2/roadmap. Same data as the page, last updated 2026-10-11.

> QALO's second smart ring, also sold as the QRNT Slim. A titanium ring 2.2mm thick that tracks sleep, HRV, SpO2, skin temperature and your cycle, with no subscription. $199.95.

- Status: On sale
- List price: $199.95 (The maker's own starting price.)
- Guide: https://idevice.com/smart-rings/qalo-sr-2/roadmap
- Last updated: 2026-10-11

## Can it do this?

- **Do I need a subscription?** No. The QALO app is free and there are no subscription charges. ([on the Guide](https://idevice.com/smart-rings/qalo-sr-2/roadmap#can-do-i-need-a-subscription))
- **How long does the battery last?** QALO rates it at up to 5 days per charge with daily use. ([on the Guide](https://idevice.com/smart-rings/qalo-sr-2/roadmap#can-how-long-does-the-battery-last))
- **What does it cost?** It costs $199.95. That is the list price. ([on the Guide](https://idevice.com/smart-rings/qalo-sr-2/roadmap#can-what-does-it-cost))
- **Does it work with my phone?** Yes, it works with an iPhone or an Android phone. ([on the Guide](https://idevice.com/smart-rings/qalo-sr-2/roadmap#can-does-it-work-with-my-phone))
- **How heavy is it?** It weighs 2.5g to 3.1g. The weight varies by size or finish. ([on the Guide](https://idevice.com/smart-rings/qalo-sr-2/roadmap#can-how-heavy-is-it))
- **What is it made of?** It is made of titanium. ([on the Guide](https://idevice.com/smart-rings/qalo-sr-2/roadmap#can-what-is-it-made-of))
- **What ring sizes does it come in?** It comes in US sizes 6 to 14. Order a sizing kit first, because it is not the same fit as a jewellery ring. ([on the Guide](https://idevice.com/smart-rings/qalo-sr-2/roadmap#can-what-ring-sizes-does-it-come-in))
- **How big is it on the finger?** It is 8mm wide and 2.2mm thick. It is thin enough to wear next to another ring. ([on the Guide](https://idevice.com/smart-rings/qalo-sr-2/roadmap#can-how-big-is-it-on-the-finger))
- **Does it measure blood oxygen?** Yes, it measures your blood oxygen. ([on the Guide](https://idevice.com/smart-rings/qalo-sr-2/roadmap#can-does-it-measure-blood-oxygen))
- **Does it track HRV?** Yes, it tracks your HRV. ([on the Guide](https://idevice.com/smart-rings/qalo-sr-2/roadmap#can-does-it-track-hrv))
- **Does it track sleep stages?** Yes, it tracks your sleep stages. ([on the Guide](https://idevice.com/smart-rings/qalo-sr-2/roadmap#can-does-it-track-sleep-stages))
- **Does it read skin temperature?** Yes, it reads your skin temperature. ([on the Guide](https://idevice.com/smart-rings/qalo-sr-2/roadmap#can-does-it-read-skin-temperature))
- **Can I pay with FSA or HSA?** Yes, you can pay with FSA or HSA money. ([on the Guide](https://idevice.com/smart-rings/qalo-sr-2/roadmap#can-can-i-pay-with-fsa-or-hsa))

## Works with

A smart ring that works with iPhone and Android.

- **Which iPhones does the QALO SR-2 work with?** Works. It works with every iPhone that runs iOS 15.1 or later, from the iPhone 6s on. Source: [QALO](https://qalo.com/products/qalo-sr-2-smart-ring). Checked 2026-10-10. ([on the Guide](https://idevice.com/smart-rings/qalo-sr-2/roadmap#q-which-iphones))
- **Does the QALO SR-2 work with Android?** Works. Yes. The SR-2 works with Android phones running Android 7.0 or later through the free QALO app from Google Play. Source: [QALO](https://qalo.com/products/qalo-sr-2-smart-ring). Checked 2026-10-10. ([on the Guide](https://idevice.com/smart-rings/qalo-sr-2/roadmap#q-android))
- **How does the QALO SR-2 handle charging?** With a limit. It charges in the included USB-C charging case, which must be plugged in to a power source. It does not charge wirelessly. Source: [QALO](https://qalo.com/products/qalo-sr-2-smart-ring). Checked 2026-10-10.
- **Does the QALO SR-2 work with iPhone?** Works. Yes. The SR-2 works with iPhone through the free QALO app (iOS 15.1 or later) and syncs steps, active energy, sleep and heart rate to Apple Health. Source: [QALO](https://qalo.com/products/qalo-sr-2-smart-ring). Checked 2026-10-10. ([on the Guide](https://idevice.com/smart-rings/qalo-sr-2/roadmap#q-iphone))
- **How does the QALO SR-2 handle subscription?** Works. No subscription. The QALO app is free, with no subscription charges. Source: [QALO](https://qalo.com/products/qalo-sr-2-smart-ring). Checked 2026-10-10.
- **How does the QALO SR-2 handle where it is sold?** With a limit. QALO sells the SR-2 in the United States and Canada only for now. Source: [QALO](https://qalo.com/products/qalo-sr-2-smart-ring). Checked 2026-10-10.

## Questions

### How much does the QALO SR-2 cost?

$199.95 at QALO's US store, in every size from 6 to 14 and in brushed gold or brushed silver. There is no subscription. Source: [QALO](https://qalo.com/products/qalo-sr-2-smart-ring). ([on the Guide](https://idevice.com/smart-rings/qalo-sr-2/roadmap#faq-how-much-does-the-qalo-sr-2-cost))

### Does the QALO SR-2 need a subscription?

No. The QALO app is free and there are no subscription charges, including for the women's health features. Source: [QALO](https://qalo.com/products/qalo-sr-2-smart-ring). ([on the Guide](https://idevice.com/smart-rings/qalo-sr-2/roadmap#faq-does-the-qalo-sr-2-need-a-subscription))

### How long does the QALO SR-2 battery last?

QALO rates it at up to 5 days per charge with daily use. It charges in the included USB-C charging case, which has to be plugged in: it does not charge wirelessly. Source: [QALO](https://qalo.com/products/qalo-sr-2-smart-ring). ([on the Guide](https://idevice.com/smart-rings/qalo-sr-2/roadmap#faq-how-long-does-the-qalo-sr-2-battery-last))

### What sizes does the QALO SR-2 come in?

Sizes 6 to 14. The SR-2 fits more snugly than a standard ring because of the raised sensors inside, so QALO recommends sizing up from your usual ring size. QALO also sells a sizing kit. Source: [QALO](https://qalo.com/products/qalo-sr-2-smart-ring). ([on the Guide](https://idevice.com/smart-rings/qalo-sr-2/roadmap#faqs-what-sizes-does-the-qalo-sr-2-come-in))

### How thin and light is the QALO SR-2?

It is 8.0mm wide and 2.2mm thick, and weighs 2.5g in size 6 up to 3.1g in size 13. Source: [QALO](https://qalo.com/products/qalo-sr-2-smart-ring). ([on the Guide](https://idevice.com/smart-rings/qalo-sr-2/roadmap#faqs-how-thin-and-light-is-the-qalo-sr-2))

### What does the QALO SR-2 track?

Sleep stages (awake, light, deep and REM, plus naps), heart rate, HRV, stress, SpO2, skin temperature, and steps, calories and distance across 54 activity modes, plus your menstrual cycle. Source: [QALO](https://qalo.com/products/qalo-sr-2-smart-ring). ([on the Guide](https://idevice.com/smart-rings/qalo-sr-2/roadmap#faqs-what-does-the-qalo-sr-2-track))

### Can I shower or swim with the QALO SR-2?

You can wear it in the shower and for shallow swims. It is not for deep diving or hot springs. Source: [QALO](https://www.qalo.com/pages/qrnt-app-manual). ([on the Guide](https://idevice.com/smart-rings/qalo-sr-2/roadmap#faqs-can-i-shower-or-swim-with-the-qalo-sr-2))

### Does the QALO SR-2 track periods and ovulation?

Yes. It predicts the start of your period and your fertile window from skin temperature and heart rate, with symptom logging and a daily journal, at no extra cost. Source: [QALO](https://qalo.com/products/qalo-sr-2-smart-ring). ([on the Guide](https://idevice.com/smart-rings/qalo-sr-2/roadmap#faqs-does-the-qalo-sr-2-track-periods-and-ovulation))

---

Source: iDevice (https://idevice.com). Every spec, rumor and grade above links to where it came from. Full Guide: https://idevice.com/smart-rings/qalo-sr-2/roadmap. This file: https://idevice.com/guide-text/qalo-sr-2.md.

## Questions and answers

### Using it

**Do I need a subscription?** No, there is no subscription. Source: QALO

**What does it cost?** It costs $199.95. That is the list price. Source: QALO

**Does it work with my phone?** Yes, it works with an iPhone or an Android phone. Source: QALO

**How heavy is it?** It weighs 2.5g to 3.1g. The weight varies by size or finish. Source: QALO

**What is it made of?** It is made of titanium. Source: QALO

**What ring sizes does it come in?** It comes in US sizes 6 to 14. Order a sizing kit first, because it is not the same fit as a jewellery ring. Source: QALO

**How big is it on the finger?** It is 8mm wide and 2.2mm thick. It is thin enough to wear next to another ring. Source: QALO

**Does it measure blood oxygen?** Yes, it measures your blood oxygen. Source: QALO

**Does it track HRV?** Yes, it tracks your HRV. Source: QALO

**Does it track sleep stages?** Yes, it tracks your sleep stages. Source: QALO

**Does it read skin temperature?** Yes, it reads your skin temperature. Source: QALO

**Can I pay with FSA or HSA?** Yes, you can pay with FSA or HSA money. Source: QALO

### Sizing and fit

**What sizes does it come in?** Ring sizes 6 to 14. Sizes 6 to 14; 8.0mm wide, 2.2mm thick Source: QALO

### Price and models

**Is there a newer one?** No. The QALO SR-2 Smart Ring is the current model. Source: iDevice

**How much does the QALO SR-2 Smart Ring cost?** List price: $199.95. Current price we last read at QALO: $199.95, October 10, 2026. Source: [qalo.com](https://qalo.com/products/qalo-sr-2-smart-ring)

### In the box

**What's in the box?** SR-2 (QRNT Slim) smart ring, Charging case, Charging cable, Two silicone covers. Source: [QALO](https://cdn.shopify.com/s/files/1/0201/1744/files/QRNT-Slim-User-Manual_4.15.26.pdf?v=1776273346)