How we test

This is the whole method. If a test cannot be traced back to these rules, do not trust the result.

Four rules

What this method covers

These four rules apply to every test we publish. They do not apply to explainers, because an explainer does not test anything. An explainer explains how something works, in plain language, with its sources listed. It is always labelled Explainer and it never carries a score.

A Short is labelled Short. When a Short reports a result, it links to the full test that produced it.

How a score is made

Each criterion has a written description of what earns a low, middle or high score. The criteria, the weights and those descriptions are published with the test, before any tool is scored.

A tool can score badly on one criterion and still be worth using. We show the per-criterion scores, not only the total, so you can weigh what matters to you.

What you get with every test

When we get it wrong

We correct the page, say what changed, and keep the date of the correction. A corrected score keeps its history instead of being quietly replaced.

Judge the results against this page

That is the point of publishing the method. Read a test, then come back here and check it.

See rankings and comparisons