DL110 Smart Ring + Ringlo: The Ring We Built This On

The DL110 is the ring Ringlo was written against. Everything we know about this category we learned by pulling it apart packet by packet, and this page is the short version.

What we actually know about this ring

The DL110 identifies itself over Bluetooth with an Actions Semiconductor ATS8266 — we read that off the ring’s own PnP record rather than a listing. It speaks the YCBT protocol, the same one behind the SmartHealth app, in variable-length packets with a CRC on the end. Ringlo reads heart rate, blood oxygen, sleep, steps and the blood-pressure estimate from it.

“DL110” is a Bluetooth profile more than it is a product. Rings that answer to it have reported three different firmware names back to us, so two rings sold under the same picture are not necessarily the same hardware inside.

The two-faced Bluetooth problem, and why it matters

This ring advertises itself twice, under two different Bluetooth addresses. One of them exposes a crippled interface that rejects nearly every command it is sent; the other exposes the full one. They are the same physical ring. An app that connects to the wrong face will pair successfully, show a battery level, and then fail to fetch anything — which looks exactly like a broken ring.

Ringlo connects to the full face, and if a ring flips between the two during pairing it disconnects and re-reads the ring rather than settling for the crippled one.

What it does not do

No temperature. We read the capability flags off every ring in our fleet that carries them: 40 report a temperature sensor and every one of those is a different ring family — 484 DL110-family rings report none. Ringlo hides the feature rather than showing you a dash forever. No ECG. No blood sugar, whatever a listing says.

Step counts: honest about a disappointment

This ring counts steps badly, and we can prove the app is not the reason. We ported the stock app’s own decoder line for line and ran both against the same recorded Bluetooth traffic: they disagreed on zero frames out of 127. A counted fifty-step walk stored as zero; a morning at a desk stored 758. The stock app would show you the same numbers. Distance and calories are the step count multiplied by a stride the firmware picks, so they inherit every step error.

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: COLMI R02 · 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.