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Editorial policy

The rules every page on Ring & Rest follows: who decides what we recommend, where the facts come from, how we handle health claims, and how mistakes get fixed.

By Mike M. · Updated September 2026

Independence

  • No brand pays for placement or reviews. There are no sponsored posts on this site.
  • Commissions never pick a winner. We earn from Amazon purchases (see the affiliate disclosure), but scores come from the published rubric on our methodology page, and the rubric doesn't know which links earn.
  • We cover rings we can't earn on. The Ultrahuman Ring PRO and the Circular Ring 2 are sold only by their makers, and we rank them on the same rubric as everything else, with plain links that pay us nothing.
  • Every product gets its weaknesses stated. Each pick carries a “skip this if” line, whether the problem is a fee, a phone restriction, a thin evidence base or a sizing catch.

Sourcing

  • Fees come from the brand's own US policy page, with the date we checked it. Multi-year totals are computed from that rate by the site's code, never typed.
  • Specs, sizes, battery and warranty terms come from the maker's own pages first, then the retail listing. Battery life and accuracy percentages the maker publishes are labeled as the maker's claims.
  • Accuracy comes from published validation studies, cited by journal and year, with the sample size, the reference device and the funding source. Preprints and brand in-house studies are labeled as such.
  • Reviewer observations are credited to the reviewer by name, never presented as our own.
  • Unknowns are stated. If a brand doesn't publish a figure, we say so rather than estimate it.

The source tiers and the evidence ranking are set out in full in the methodology.

What we don't claim

  • That anyone at Ring & Rest has worn, owned or lab-tested a ring we cover. We haven't lab-tested these rings, and every pick is labeled Researched.
  • Credentials, titles or experience the author hasn't provided.
  • That one brand's ring sizes match another's. No brand publishes such an equivalence.
  • Ring prices we didn't pull live from the retailer.
  • That a wellness feature can diagnose anything. See the health rules below.

Health content

Nothing on Ring & Rest is medical advice. Smart rings are consumer wellness devices. Their sleep, heart rate, HRV, blood oxygen and temperature readings are useful for spotting trends in your own data, but they are not diagnostic tools, unless a specific feature has been authorized or cleared by a regulator such as the US Food and Drug Administration. When a feature has that authorization, we cite it. When it doesn't, we say so.

Where things stood when we last checked, in September 2026:

  • None of the ring features we cover is FDA-cleared today. Oura is pursuing FDA clearance for a blood pressure feature, according to MedTech Dive (MedTech Dive, Oct. 2025), and we found no smart ring with an FDA-cleared blood pressure feature. RingConn describes its Gen 3 as “not a medical device,” and its Gen 2's “90.7% Sleep Apnea Monitoring Accuracy” is the maker's own claim.
  • Galaxy Ring sleep apnea is announced, not live. Samsung has announced an FDA-cleared sleep apnea risk feature for the Galaxy Ring, due in fall 2026 according to press reports (Android Authority, Gizmodo). We treat it as coming until it actually ships, and we'll update our pages when it does.
  • No ring measures blood glucose. In a February 21, 2024 safety communication, the FDA said: “The FDA has not authorized, cleared, or approved any smartwatch or smart ring that is intended to measure or estimate blood glucose values on its own” (FDA). The FDA warned that inaccurate glucose readings can lead to errors in diabetes management.

On every health-related page we:

  • state only what the cited study, the brand or the regulator actually says;
  • give the study's size, who took part and what it compared the ring with, plus its limits;
  • label maker accuracy figures as claims; and
  • show a not-medical-advice note.

Talk to a clinician. If your ring flags something that worries you, or you don't feel well, talk to a doctor rather than relying on the app. A wellness reading can't rule a condition in or out. Our guides to smart rings and sleep apnea and whether a smart ring can measure blood pressure go through the evidence in detail.

Corrections

If something on a page is wrong or out of date (a fee that changed, a ring that's been discontinued, a study we misread), email mike@blackironathletics.com or use the contact form. Tell us the page and what you think is wrong, and include a source if you have one.

We check every correction against the original source. If we were wrong, we fix the page and add a dated line to its “What changed” list saying what changed. We don't quietly edit a fee, a score or a pick without leaving that note.

Update cadence

  • Subscription and cost pages: every fee re-checked monthly, and immediately when a brand changes its pricing or policy.
  • Rankings: monthly, and immediately for a new model, a discontinuation or a change in US availability.
  • Comparisons and reviews: quarterly, and immediately for a new generation or an app change that moves a feature behind a paywall or changes battery life.
  • Accuracy, battery and sizing guides: every six months, and immediately when a new validation study is published or a brand changes its sizing or warranty.

A page's “Updated” date changes only when its content materially changes, not when a re-check finds nothing new. The full schedule is on the methodology page.

Questions about this policy

Email mike@blackironathletics.com. Who publishes the site, and why, is on the about page.