Affordable sleep and blood oxygen tracking without the premium price tag
Visit SleepOn →The Go2Sleep Ring from SleepOn is one of the most budget-friendly options in the smart ring category, coming in at roughly half the price of premium competitors like Oura. Don't let the low price fool you though — this ring packs a surprising amount of functionality into its lightweight plastic shell, including sleep stage tracking, continuous heart rate monitoring, blood oxygen (SpO2) measurement, and even sleep apnea risk detection. After two weeks of nightly wear, we found the sleep tracking to be reasonably accurate for a budget device, correctly identifying sleep stages about 80% of the time compared to our reference Oura Ring. The SpO2 tracking is a standout feature at this price point, and the ring's ability to flag potential breathing disturbances during sleep could be genuinely valuable for users concerned about sleep apnea. Battery life is impressive at 7-10 days per charge, and the whole ring weighs just 3 grams. The tradeoffs? The plastic build doesn't feel nearly as premium as titanium or ceramic options, the app interface is somewhat clunky, and there's no temperature tracking or readiness score. But for $149, you're getting an awful lot of sleep data for your money.
Continuous SpO2 tracking throughout the night measures your blood oxygen levels and flags potential drops that could indicate sleep apnea or other breathing issues. A rare feature at this price point that's usually only found on premium wearables.
Tracks light, deep, and REM sleep stages along with sleep duration, efficiency, and number of awakenings. Generates a daily sleep score and provides personalized tips for improving your sleep quality based on your patterns.
Despite the budget price, Go2Sleep delivers impressive battery endurance. In our testing, we consistently got 8-9 days between charges with default settings, which means charging roughly once per week. The compact charging case is easy to travel with.
All core features — sleep tracking, heart rate, SpO2 monitoring, and sleep apnea risk detection — are available out of the box with no ongoing subscription. You pay $149 once and own it forever, with free app updates included.
| Material | Medical-grade polycarbonate plastic |
|---|---|
| Thickness | 3.0mm |
| Weight | 3g (size-dependent) |
| Width | 7.8mm |
| Sensors | PPG optical sensor (green + red LEDs), 3-axis accelerometer |
| Tracked Metrics | Sleep stages, HR, HRV, SpO2, steps, calories, sleep apnea risk |
| Battery Life | 7-10 days |
| Charging | Magnetic USB charger, ~90 min to full |
| Water Resistance | IP68 (up to 50m) |
| Size Range | US sizes 6-12 |
| Subscription | None required |
| Price | $149 |
| Feature | Go2Sleep Ring | Oura Ring Gen 4 | RingConn Gen 2 |
|---|---|---|---|
| Starting Price | $149 | $349 | $299 |
| Subscription | None | $5.99/mo | None |
| 3-Year Total Cost | $149 | $564.64 | $299 |
| Battery Life | 7-10 days | 7 days | 10 days |
| Material | Plastic | Titanium | Stainless steel |
| SpO2 Tracking | Yes | Yes | Yes |
| Temperature Tracking | No | Yes | Yes |
| Best For | Budget sleep tracking | Premium accuracy | Value & battery |
Go2Sleep is accurate enough for general sleep tracking but not quite at Oura's level. In our side-by-side testing, Go2Sleep correctly identified sleep stages about 80% of the time versus Oura's 90%+ accuracy. Total sleep time was within 15-20 minutes of Oura's readings on most nights. For $149 versus $349 plus subscription, the accuracy gap is understandable.
It can flag potential issues, but it's not a medical diagnosis. Go2Sleep tracks SpO2 drops and breathing patterns during sleep, and will alert you if it detects patterns consistent with sleep apnea risk. If you get a warning, we recommend following up with a doctor — consider it a screening tool, not a definitive diagnosis.
Yes, Go2Sleep tracks basic activity metrics like steps, calories, and heart rate during the day in addition to sleep at night. However, it's primarily designed as a sleep tracker — daytime features are basic and not as comprehensive as fitness-focused wearables. If you want detailed activity tracking, look at Oura or a fitness watch instead.
The medical-grade polycarbonate plastic is surprisingly durable for everyday wear. It's scratch-resistant enough that keys and coins won't leave marks, and it's fully waterproof. That said, it won't feel as premium as titanium or ceramic, and it may show signs of wear after a year or two of heavy use. Given the $149 price, we think the tradeoff is acceptable.
The Go2Sleep Ring is the best budget option for anyone who wants sleep tracking and blood oxygen monitoring without paying premium prices. At $149 with no subscription, it costs literally a fraction of what you'd pay for an Oura Ring over three years. The sleep tracking is good enough for most people, the SpO2 monitoring is a nice bonus, and the 7-10 day battery life is impressive. The plastic build feels cheap and the app could use polish, but at this price point those are acceptable tradeoffs. If you're curious about sleep tracking but don't want to drop $300+ to get started, this is the ring to buy in 2026.
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