RingConn Gen 2 Review: A Month With the No-Subscription Smart Ring

After a month with the RingConn Gen 2, I'm glad I bought it. The single missing piece is vibration — but even accounting for that, a month of continuous use has left me convinced I couldn't give it up.

RingConn Gen 2: specs and positioning

The RingConn Gen 2 is the second-generation smart ring from China-based RingConn, launched in late 2024 after raising over $4.4 million on Kickstarter (general retail in Japan followed in February 2025). Its position in the smart ring market rests on three pillars: no subscription, sleep apnea monitoring, and up to 12 days of battery — aiming at a different audience than the Oura Ring 4 (which requires a roughly $5.99/month membership) or the Samsung Galaxy Ring (currently Android-only).

The official price is $299, and it's frequently discounted on Amazon. Compare that with the Oura Ring 4 — around $349 plus the monthly membership — and the total-cost gap grows considerably once running costs are factored in.

Key specs

Compared with the first-generation model, the width shrinks 12%, the thickness drops 23%, and battery life stretches from 6–7 days to up to 12. The headline addition is sleep apnea monitoring — a rarity at this price.

Against the competition: the Oura Ring 4 assumes a ~$5.99/month membership, which adds up to over $140 across two years of use. The Samsung Galaxy Ring is currently Android-only, ruling out iPhone users. The RingConn Gen 2 supports both iOS and Android with no subscription, making it an easy candidate regardless of platform. For a closer look at the Oura Ring 4, our Oura Ring 4 vs SOXAI RING 2 comparison is a good companion read.

A month of nonstop wear: what the RingConn Gen 2 is really like

Getting the size right — don't guess, measure

The RingConn Gen 2 comes with a sizing kit, and one caution up front: smart ring sizing is unforgiving, and your usual fashion-ring size isn't a safe guide — the fit needs to be snug enough for the sensors to read reliably. It uses standard US sizes 6–14.

Even before the sizing kit arrived, I got my size right by wrapping a thread around the base of my finger and measuring it. One piece of thread — primitive, but it works.

I currently wear a US 9 on my right index finger (I'm left-handed, so that's my non-dominant hand).

Inside the band are two small round bumps that naturally orient the ring toward your palm. You never have to think about sensor alignment — just slide it on and it settles into the right position. A small touch, but it's one you appreciate every single day.

Comfort — there are moments you notice it, but that's all

For a month I wore it essentially around the clock — at work, off work, and in bed, taking it off only for the bath. At 2–3 g, it has almost no presence, exactly as the number suggests.

Typing and carrying things cause virtually no awkwardness. But because it's wider than a fashion ring, there are moments — bending a finger, gripping something hard — when you notice: "ah, right, I'm wearing it." Not intrusive; more like being reminded it exists. Even after a month the sensation never fully disappeared, but it only ever lasts an instant.

Water resistance is IP68, rated to 100 m — on paper, sinks and showers are no problem. I still take it off to wash my hands, purely because soap and chemicals touching a precision device bothers me. That one's a personality thing.

The matte black finish — still clean after a month

The matte finish has no gloss, with a slightly deep tone that hides scratches and skin oil well. A month of nonstop wear and it still looks clean — I credit the finish. It blends right into everyday clothes, and nobody notices it unless they ask, "wait, is that a smart ring?"

Sleep tracking is the main event — an honest 63 for a five-hour-a-night parent

The RingConn Gen 2's greatest weapon is sleep tracking. It records four stages — REM, light, deep, awake — and extends to apnea detection and even eye-movement measurement. Sleep apnea monitoring at this price is genuinely rare right now.

As a parent whose nights routinely top out at five hours, my sleep score hovers around 63. The ring is an honest one. Every morning it might as well be telling me, "please, get some more sleep."

The sleep summary screen compares against the previous day and serves up concrete health advice — "cut back on caffeine," "work in some exercise." Not a vague "sleep well!" but suggestions at the level of actual behavior, which makes them useful.

Goal-setting is granular too: set targets for average sleep duration and bedtime and it reminds you each morning. Whether I hit them is another matter, but it keeps me honest.

Vitals — a finger yields far more data than you'd expect

Heart rate, SpO2 (blood oxygen), skin temperature, respiratory rate, even shallow-breathing alerts — the sheer amount of data one finger can produce is genuinely surprising. Compared with a smartwatch, there's no health metric where it falls seriously behind.

The app — a data-lover's delight

The RingConn app presents your data in impressive depth. Bar charts, line graphs, pivot-style views — you can track day-to-day changes visually from every angle. If you're the kind of person who enjoys poring over numbers, opening the app becomes a small morning pleasure.

My personal favorite is the stress check: a four-level smiley character appears with a comment, and it lands instantly. Softening hard data with a character is a balance the app gets just right.

What to know before you buy

1. No vibration — the one and only real weakness

This is the point that carries all of the RingConn Gen 2's "so close." There is no vibration motor. Which means no waking gently to a vibration alarm — one of the features you'd most want from a smart ring.

My current workaround is pairing it with my phone's alarm, which is fine in practice. But missing the experience of being nudged awake by a buzz at your fingertip is a genuine shame. I'm strongly hoping the next generation adds it.

2. Take the sizing seriously

Check your size properly before ordering — use the sizing kit (free to request) or measure with a thread. Ordering "your usual ring size" is how you end up with a fit that's off, and a loose smart ring means unreliable data. There's no rush; confirm first.

Where it shines

Health tracking for mechanical-watch lovers

One part of the RingConn Gen 2's concept that resonated with me: it's designed to be stacked with a real watch. Your favorite timepiece on the wrist, the smart ring on a finger. If you want a wearable but your wrist is reserved for a watch, this is the option that hits home.

Round-the-clock health monitoring

At 2–3 g, wearing it 24 hours a day is no burden. It doesn't interfere with typing at work and doesn't get in the way of sleep. That total absence of "sacrificing something to collect data" is what sets it apart as an everyday device.

For the subscription-fatigued

The app is free forever, and that matters more than it sounds. Against a model like the Oura Ring 4 with its ~$5.99/month membership, the gap exceeds $140 over two years. Owning every feature outright, with no meter running, is reassurance that compounds the longer you use it.

For a comparison with the SOXAI RING 2 — another subscription-free ring — see our SOXAI vs RingConn: which one to buy?.

Verdict: the answer for people who are tired of smartwatches

A month of hard use later: the RingConn Gen 2 was worth buying.

The missing vibration is the one regret. Everything else is executed at such a high level that if you can live without that, this is a smart ring with no blind spots.

It's ideal for:

• Mechanical-watch lovers who want to keep their wrist free
• People serious about understanding their sleep (the apnea detection is especially valuable)
• Anyone who wants to avoid subscriptions and running costs
• People worn down by smartwatch charging routines and wrist presence
• Users on either iOS or Android

Before buying, just remember the two caveats: no vibration means no alarm duty, and take the US sizing seriously.

If it only had vibration I could have fully graduated from smartwatches — that's the one near-miss. Even so, I have no intention of taking it off, and at this price it's an easy "buy."

For another take on smart rings, see our Oura Ring 4 review — switching from a fitness band.

If you're considering a cheaper entry-level smart ring, we've also reviewed the b.ring G2, a budget model sold in Japan.

And if you want to see how the RingConn Gen 2 stacks up against the wider field, our roundup comparing five major smart rings shows where everything sits.