Open any "Smart Ring" listing on AliExpress, Temu, Amazon Basics, or the hundreds of no-name Shopify stores reselling them. The product photos rotate through about four case designs. The feature lists are copy-pasted. The companion app is always one of SmartHealth, HBand, Wearfit, or "YCBT Life."
That's not a coincidence. It's a single supply chain.
The three things inside every cheap smart ring
1. The chip: Actions Semiconductor ATS8266
A Chinese-manufactured Bluetooth SoC (system-on-chip) that handles BLE, power management, and the main application firmware. It's the brain. Almost every sub-$50 ring uses either the ATS8266 or a near-identical Jieli chip.
2. The PPG sensor: Goodix GH3018
Goodix is a Chinese sensor manufacturer. The GH3018 is a three-LED optical sensor (green for HR, red + IR for SpO2) that's been on the market since about 2021. This is the same sensor class Oura used in Gen 1 and Gen 2. It's a commodity now.
3. The SDK: YCBT
Shenzhen Yucheng Technology (YCBT) writes the firmware and provides the Android/iOS SDK that turns the chip + sensor into a functional smart ring. When you download "SmartHealth," you're running YCBT's SDK with a custom logo. Same with HBand, Wearfit, Da Fit, and YCBT Life.
So why are there so many "brands"?
Because the Chinese consumer electronics supply chain is organized around white-label manufacturing. A factory in Shenzhen produces the rings. Dropshippers and brand-agnostic Amazon sellers buy them in bulk, stick their own logo on the box, and resell at markup.
Common examples:
- Colmi R02 / R06 / R10 — same ATS8266 + GH3018, slight case variations
- DL110 — the commodity reference design
- Cosinuss, AOFIT, Zepan, BenBen, HMED — all the same underlying hardware
- Amazon private labels like "Wellue", "InBody", "Aeofit" at the low end
The tell: they all work with the same app (SmartHealth / HBand / Wearfit).
What this means for buyers
You can't really pick by "brand"
Since most of the hardware is identical, the brand mostly affects the engraving, the case finish, and sometimes the charger dock. Pay attention to:
- Ring sizing accuracy — some factories ship measurably bigger or smaller than labeled. Read reviews for your specific seller.
- Charger quality — some docks are flaky. A broken charger means a broken ring.
- Build quality / finish — not all ceramic coatings survive 6 months.
Software is the only real differentiator
Since the sensor is the same, data quality is mostly capped by the firmware and the app. The stock YCBT apps are mediocre. A third-party app (like Ringlo) can dramatically improve the experience on the exact same hardware — better sleep staging, proper readiness scoring, real trends, no ads, data export.
Premium rings earn their premium
The Oura and Samsung Galaxy Ring use custom silicon, custom sensors, and years of ML-trained signal processing. That's why they cost 10x more. The commodity hardware closes 70% of the gap for 10% of the price, but the remaining 30% (particularly HRV stability and skin temperature) is real.
What to look for in a cheap ring
- Claims compatibility with SmartHealth, HBand, Wearfit, YCBT, or Da Fit (tells you it's on the commodity platform — and that it'll work with Ringlo)
- Shipped from a verified AliExpress Choice store or reputable Amazon seller (reduces QC lottery)
- Comes with a sizing kit if you're buying online without trying on
- 4-5 day claimed battery life (shorter = probably a dud battery; longer = probably lying)
The takeaway
Don't overthink which brand you buy. Think about:
- Getting the right size
- From a seller with a return policy
- And pairing it with an app that isn't SmartHealth
The hardware is a commodity. Your experience depends on the last 20%.
Ringlo is a modern third-party app for this exact class of rings. 14-day free trial, download it here.