Editorial Policy
The rules every page here is written and checked under — so you can judge the content the way I judge it before it ships.
Sources first
Numbers come from published sources — the IBO and ATA standards, manufacturer charts (Easton, Gold Tip) and the Ashby Bowhunting Foundation's research — never from other calculator sites and never from memory. Each page names its own sources; the Methodology page carries the full list with what each source is used for.
Formulas shown
No result appears without its working. Every tool page states its formula, at least one fully worked example whose arithmetic a reader can reproduce, and the limits of the model it uses. If a claim on a page can't be traced to a formula or a named source, it doesn't ship.
AI assistance, disclosed
AI tools help draft text and code for this site. They do not set the numbers: every formula, constant, table and worked example is checked by Ian Welkins against its source before publication, and the checks are re-run when any page changes.
Corrections
Errors reported through the report an error page are verified against the source and fixed on the page, with the correction noted and the reporter credited. Pages carry a "checked" date that moves only when the content has actually been re-verified.
No bought opinions
No manufacturer pays for placement, ranking or favourable numbers here. Where a brand's chart or standard is used, it's because it's the published reference for the job — and it's named as a source, not an endorsement.