COLMI R02 + Ringlo: A Different Ring Entirely

The R02 is not a DL110 with a different band. It is different silicon speaking a different protocol, and Ringlo had to be taught it separately.

Why this one needed its own work

Most of the rings on this site speak YCBT. The R02 family does not — it is BlueX silicon speaking what the community calls the QRing protocol: a different Bluetooth service, sixteen-byte commands with a checksum, and a separate channel for bulk history. Support for it is a second implementation inside Ringlo, not a setting.

It also insists on a proper Bluetooth pairing with encryption before it will accept a single command. That is why an R02 sometimes needs to be paired in your phone’s Bluetooth settings as well as in the app, where a YCBT ring does not.

Tested on the R10, matched on the R02

We will be precise about this, because the distinction matters if you are about to spend money. The adapter was built from a recorded session with a COLMI R10 that we own and can hold. The R02, R03 and R06 are recognised as the same protocol family on the strength of that capture plus two independent open-source projects that document the same framing. We have seen R02s, R04s, R06s and R09s connect and exchange data in the field. We have not had an R02 on this desk.

What Ringlo will not offer you on this ring

No blood pressure. Not hidden, not greyed out — absent. This protocol has no blood-pressure command at all, so rather than show a Measure button that could only ever return dashes, Ringlo removes the card for R02 owners. A customer hit exactly that before we fixed it.

Two decodes we got wrong, and fixed

For three months Ringlo read this ring’s live heart rate out of the wrong byte — the value moved against the real rate, which we only caught by correlating thirteen readings from real rings. Sleep was worse: our reading of the history format matched 22 of 425 recorded payloads. The corrected one parses all 425, and every day block adds up to its own span. Both were fixed in September 2026, and we corrected the stored data for the users affected rather than leaving it.

One lookalike that will not work

Rings that advertise as QRRM look like this family and are not. They expose none of the three Bluetooth services this protocol needs. Five people have tried, eleven times, across two years of app versions, and none succeeded. If your ring shows up as QRRM in the scan, it is not this.

About the blood-pressure number

Almost every listing in this category advertises blood pressure. We took that apart on a ring we own, and the answer is the same for all of them: the figure is produced by the ring’s own firmware from your pulse, and it is an estimate, not a measurement. None of these rings has a cuff — we checked the capability flag on 941 of them and not one claims an inflatable band. The vendor’s own idea of “calibration” is a settings screen where you type in your normal blood pressure. Ringlo shows the number because your ring produces it, labels it an estimate, and never writes it to Apple Health or Health Connect, because a health record files it next to real cuff readings.

Why use Ringlo

• A dark dashboard with no ads and no machine-translated menus
• Sleep stages corrected against the raw data, not the stock app
• Readiness, HRV and stress explained in plain English
• Fifteen hand-written translations, not machine output
• Your ring’s stored history is never deleted by us

The other rings we list

Every ring we list gets its own page saying what we have and have not tested on it: DL110 · Anarow · DREAM SPORT · Floral Enamel · CNBRO · HPLSZCN. The full list, with what each badge means, is on the compatible rings page.

Compare Ringlo with the stock app on the comparison page, or start on the Ringlo homepage.