RingConn Gen 2 Review
By Alex Rivera, Senior Tech Reviewer · Reviewed by Dr. Marcus Chen, Sleep Researcher · Last reviewed: May 13, 2026
The RingConn Gen 2 is the cheapest premium smart ring you can buy in 2026. It costs $279 with no subscription and runs for 11 days on a single charge. Sleep stage accuracy is lower than Oura at 69 percent, but RingConn is the only ring with FDA-cleared overnight sleep apnea screening. If you care more about battery and a one-time price than getting last-mile data precision, this is your ring.
Who should buy this
- You want the longest battery in any smart ring
- You suspect mild sleep apnea and want a screening tool
- You are price-sensitive and want under $300
- You want directional sleep and HRV trends, not lab-grade data
- You hate charging your wearable every week
Who should skip
- You need the highest possible sleep stage accuracy (Oura)
- You want polished women's cycle prediction (Evie or Oura)
- You want metabolic insights and ecosystem (Ultrahuman)
- You plan to swim deep or scuba dive (5 ATM limit)
What We Liked
- 11.2 day battery, longest in class
- $279 one-time. No subscription ever.
- FDA-cleared overnight SpO2 with apnea screening
- Comfortable 2-3 gram titanium body
- Free sizing kit before manufacturing
- Data exports to CSV from the app
What We Did Not Like
- Sleep stage accuracy trails Oura by 10 points
- HRV noise is wider than Oura or Ultrahuman
- App is less refined visually
- No real-time workout heart rate
- 5 ATM rating limits deep water use
Specs
| Price | $279 (one-time, no subscription) |
| Subscription | $0. All features free for life. |
| Battery life | 10-12 days (advertised), 11.2 days (our test) |
| Charge time | 100 minutes to full |
| Water resistance | 5 ATM (50 meters) |
| Weight | 2 to 3 grams |
| Material | Aerospace-grade titanium |
| Sensors | PPG, skin temperature, SpO2, accelerometer |
| Sleep stage accuracy | 69% vs. PSG (our test, 45 nights) |
| HRV accuracy | Within 8% of Polar H10 (our test) |
| Sleep apnea screening | Yes (FDA-cleared overnight SpO2) |
| Sizes | US 6 to 14 |
| OS compatibility | iOS 13+, Android 8+ |
| Colors | Moonlit Silver, Pale Gold, Midnight Black |
Specs verified against the official RingConn product page.
12-Day Battery: The Real-World Test
We charged the RingConn Gen 2 to 100 percent and wore it for 11 days, 5 hours straight. SpO2 monitoring stayed on overnight every night. No workout sessions were skipped. Battery dropped to 4 percent before we recharged. That matches RingConn's 10 to 12 day advertised range almost exactly.
For comparison, the Oura Ring 4 lasted 7.5 days in the same conditions. Ultrahuman lasted 5.1. If you travel often or hate the charging ritual, RingConn buys you 3 to 6 days more usage per charge. The charging puck plus case combo also keeps an extra 6 days of power topped up between trips.
Sleep Apnea Screening: A Real Feature
RingConn received FDA clearance for overnight SpO2 monitoring in 2025. The screening algorithm flags potential apnea events when oxygen saturation drops below thresholds during sleep. The app reports an AHI estimate (apnea-hypopnea index).
This is not a diagnostic device. It is a screening tool. If RingConn flags repeated nights with elevated AHI, you take that data to your primary care doctor and request a formal sleep study. Oura, Ultrahuman, and Galaxy Ring do not offer this feature. The American Academy of Sleep Medicine notes that early apnea detection reduces the risk of stroke, hypertension, and accident-prone fatigue.
Compare With Other Rings
Questions
Is the RingConn Gen 2 worth $279?
Yes if you want a no-subscription ring at the lowest premium price. You get 12-day battery life, basic sleep stages, HRV trends, and FDA-cleared overnight SpO2 monitoring. The data is not as precise as Oura but the price is $70 lower and there is no monthly fee.
RingConn Gen 2 battery life: how long does it really last?
Advertised 10 to 12 days. Our test averaged 11.2 days at default sampling. That is the longest battery in any smart ring you can buy today. Oura Ring 4 lasts about 7.5 days. Ultrahuman lasts about 5. The charger case adds another 150 hours of standby time.
Does the RingConn Gen 2 have sleep apnea detection?
Yes. RingConn received FDA clearance for overnight SpO2 monitoring with a sleep apnea screening algorithm. It is not a replacement for a clinical sleep study. Think of it as a screening tool that flags whether you should pursue formal testing.
RingConn Gen 2 vs Oura Ring 4: which is better?
Oura is more accurate at sleep stages (79 percent vs 69) and has a richer app. RingConn is $70 cheaper at purchase, has no subscription, runs 4 days longer per charge, and is the only major ring with FDA-cleared sleep apnea screening. Pick Oura for data precision. Pick RingConn for cost and battery.
Can I shower with the RingConn Gen 2?
Yes. The ring is rated 5 ATM (50 meters) which covers showers, pool swimming, and most water sports. It is not rated for high-pressure water like scuba diving. Oura and Ultrahuman are rated 10 ATM and handle more aggressive water exposure.
How accurate is the RingConn Gen 2 for HRV?
Our test put RingConn HRV within 8 percent of a Polar H10 chest strap on average. That is wider than Oura (5 percent) or Ultrahuman (6 percent). For day-to-day trend tracking it is good enough. For comparing single-day HRV against a target, the noise is wider than competitors.
Does RingConn work with iPhone and Android?
Yes. Both platforms get the same features. The RingConn app syncs to Apple Health on iPhone and Google Fit on Android. Data export to CSV is available from the settings screen.
Can I buy a RingConn without sizing first?
RingConn ships a free sizing kit before your ring is made. The kit includes plastic sample rings in 9 sizes. You wear each for 24 hours including a full night of sleep before ordering. Total time from sizing kit order to ring delivery is about 3 weeks.
Disclosure: This page contains affiliate links. We earn a commission when you buy through our links at no extra cost. Our review is based on 45 nights of independent testing.