Editorial policy

Last updated 2026-09-07

Independence

Rankings are never sold. No brand pays for placement, for a review, or for a position in a table on this site, and none will. Rank order comes from a published rubric whose inputs are figures the seller published - commission rate is not one of them.

We accept no free products and no sponsored placements. Both numbers are zero and we intend to keep them there, because a claim that we have never been given anything is worth more than any individual unit.

The claims we will not make

These are hard rules rather than style preferences, and they are the reason several pages on this site read differently from their competitors.

We will not claim to have tested anything. No “we tested”, no “in our testing”, no “after six weeks of use”, no “hands-on”. We have not used these products.
We will not invent a figure. Not a price, not a rating, not a review count, not a wattage, not an EMF reading. Where something is not published, the page says Not published.
We will not claim a credential. No certifications, no expert panel, no medical review, no years of experience. The author is an enthusiast and the site says so.
We will not publish a testimonial or a review of ourselves. This site has no customers, so there is nothing to quote.
We will not make health claims. Where we discuss physiology we cite peer-reviewed literature, report the findings that cut against the popular claim as well as the ones that support it, and carry a not-medical-advice line.

Corrections

If we get something wrong, tell us: info@contrastden.com, or the contact form. Useful things to send: a spec we read wrong, a figure that has changed on a listing, a product that has been discontinued, a source we should have cited.

What happens next:

We check the claim against the primary source ourselves, not against your summary.
If it is right, we fix the page.
The correction appears on the page, dated. Not as a silent edit. A publisher that quietly rewrites history is not a publisher you can check.
The page’s modification date is updated, which also updates the sitemap and feed.

Products change. Sellers revise listings, add specifications, discontinue models and get recalled. A page here is a snapshot of what was published on a stated date, and every figure carries that date so you can tell how old it is.

Update cadence

Content type	Reviewed	Off-cycle trigger
Roundups and comparisons	Quarterly	A ranked product is discontinued, recalled or leaves the retailer
Brand pages	Every 6 months	The manufacturer revises specs or warranty
Cost guides and methodology	Every 6 months	The EIA rate changes materially
Evidence guides	Annually	Significant new primary research
Trust pages	Annually	Any change to how the site operates
Prices	Daily, automated	-
Safety notices and recalls	Same week	Always

A price refresh is not a content change. The daily price update never touches a page’s modification date, because a sitemap claiming every page changed every day is a sitemap that search engines stop trusting - and the modification dates on this site are supposed to mean something.

How products get chosen

Eligibility for a ranked pick with a buy button is set out in section 2 of the methodology. In short: a live listing we read on a stated date, and a product actually purchasable through a link we can build. A product we cannot link may be discussed for completeness but never gets a buy CTA, and the page says so at the top.

Every roundup names at least one product we recommend against, with the reason. A roundup where everything is recommended is an advertisement with a table in it.

How this site is funded

Affiliate commission, disclosed at the top of every commercial page and in full on the disclosure page. It does not affect rank order, and the pages where we earn nothing say so in their opening paragraph.

Sources

We cite primary sources: the U.S. Energy Information Administration for electricity rates, the Consumer Product Safety Commission for recalls, peer-reviewed journals for physiology, and the seller’s own listing for every product specification. We do not cite a blog quoting the EIA, or a news article about a recall, when the original document is available.

Every research-bearing page ends with a Sources section listing what we read and when.