Oura Ring 4 vs Amazfit Helio Ring: Is Oura’s Sub Worth It?

Both rings promise the same thing: better sleep, smarter recovery, fewer distractions. Only one delivers the polished experience athletes actually stick with.

Key Differences

• Battery life: The Oura Ring 4 runs 8 days per charge, double the Helio’s 4 days. If you hate charging, this matters.
• Price: The Helio Ring lands at $299 vs the Oura’s $349. A $50 gap that gets you roughly 70% of the experience.
• Size and weight: The Oura is slimmer at 7.9mm and 3.3g. The Helio is chunkier at 2.6mm thick and 3.75g. On a finger, that 0.45g difference is noticeable.
• Water rating: Oura is rated to 100 meters; the Helio is rated to 10 ATM (roughly 100 meters too, but Amazfit’s testing is less rigorous).
• App maturity: Oura’s app is the reason people pay more. The Helio uses the Zepp app, which works but feels like a wristwatch app trying to be a ring app.

Deep Dive Comparison

Design & Comfort

The Oura Ring 4 is the slimmer, lighter option. At 7.9mm wide and 3.3g, it sits flat on the finger and rarely catches on anything. The titanium finish is sleek and the recessed sensors make it look like jewelry, not a gadget.

The Amazfit Helio Ring goes the other direction. It’s 2.6mm thick (per the spec sheet, though most reviewers note it’s bulkier than that) and weighs 3.75g. The titanium outer shell with resin inner is a smart cost cut, but the ring feels chunkier on the finger. If you have small hands or hate bulky rings, you’ll feel the difference immediately.

Battery Life

Oura claims 192 hours (8 days). Helio claims 96 hours (4 days). In real-world use, the Oura typically delivers 6 to 7 days; the Helio lands around 3 to 4. If you forget to charge things, the Oura forgives you. The Helio does not.

Health & Fitness Features

Both rings track the core metrics: heart rate, HRV, SpO2, skin temperature, and sleep. Neither has GPS, so outdoor runs still need your phone or watch.

Where they diverge is sensor quality and app polish. The Oura’s red and infrared LED array, plus its digital temperature sensor, deliver more reliable sleep staging and daytime HR readings. The Helio’s sensor suite covers the same metrics, but reviewers consistently note more dropped readings during high-intensity intervals and less consistent overnight HRV tracking. For casual users, the Helio is fine. For anyone training seriously, the Oura’s accuracy edge is real.

Smart Features

Neither ring is smart in the watch sense. No display, no music controls, no NFC payments, no speaker or mic. You get notifications pushed through the app, period. If you want a wearable that does more than track health, buy a smartwatch. If you want a wearable that gets out of the way while it tracks, both rings qualify.

Price & Value

The Oura Ring 4 starts at $349, and that doesn’t include the optional $5.99/month subscription for full insights (though a basic tier is now free). The Helio Ring runs $299 with no subscription required for its core features.

On pure value, the Helio wins. You get 80% of the health tracking at 85% of the price, with no subscription. The Oura is the better product, but the Helio is the better deal for anyone who isn’t obsessing over sleep scores.

Technical Specs

Spec	Oura Ring 4	Amazfit Helio Ring
Price	$349	$299
Width / Thickness	7.9 mm	2.6 mm
Weight	3.3 g	3.75 g
Case Material	Titanium	Titanium alloy (outer), Resin (inner)
Water Rating	100 meters	10 ATM
Battery Life	192 hours (8 days)	96 hours (4 days)
Sensors	Red & Infrared LEDs (SpO2), Green & Infrared LEDs (HR, HRV), Digital Temperature Sensor, Accelerometer	HR, SpO2, Stress, HRV, Sleep, Skin Temperature, Breathing Rate
Connectivity	Bluetooth Low Energy (BLE)	Bluetooth
GPS	None	None
NFC Payments	No	No

The Verdict

Buy the Oura Ring 4 if sleep and recovery are your primary metrics, you want the most accurate sensors in a smart ring, and you’d rather pay more once than wonder if you’re missing something. It’s the better product, period.

Buy the Amazfit Helio Ring if you want a no-subscription smart ring that covers the basics, you’re not a data obsessive, and $50 plus a slimmer app is a fair trade. It’s a great entry point into the category.

Frequently Asked Questions

Which smart ring is more accurate, the Oura Ring 4 or Amazfit Helio Ring?

The Oura Ring 4 is more accurate, especially for sleep staging and HRV tracking. Independent testing has consistently shown Oura’s sensor array delivers tighter agreement with clinical-grade devices. The Helio is “good enough” for casual tracking but lags during high-intensity exercise.

Is the Amazfit Helio Ring worth saving $50 over the Oura Ring 4?

Yes, if you don’t care about the Oura app’s depth or the subscription-free experience feels like a fair trade for less polish. The Helio tracks the same core metrics for $50 less. No, if sleep and recovery are the whole reason you’re buying a smart ring; the Oura’s accuracy edge is worth the premium.

Do these rings work with both iPhone and Android?

Both rings work with iOS and Android. The Oura app is available on both platforms and has been for years. The Helio uses the Zepp app, which also supports iOS and Android, though some users report a slightly smoother experience on iOS.

Can I swim with the Oura Ring 4 or Amazfit Helio Ring?

Yes to both. The Oura is rated to 100 meters and the Helio to 10 ATM (roughly 100 meters). Neither ring is a substitute for a dedicated swim tracker, but both handle pool sessions and showers without issue.

Do I need a subscription to use these rings?

Not for the Amazfit Helio Ring, all core features are free. The Oura Ring 4 now offers a free tier with basic insights, but the most useful metrics (readiness, advanced sleep, and long-term trends) live behind the $5.99/month Oura membership. Budget for that if you go Oura.

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