Use of AI
Webtilly uses AI tools to help research and draft pages. AI output is never published unchecked: a person reads each page, checks the formula and the sources, and edits it before it goes live.
Independence and funding
Webtilly is supported by advertising and by digital products we sell ourselves. Neither changes how we choose a formula or what a result says. Formulas are chosen for accuracy. Ads are kept away from the calculator and its result. Any affiliate link is labelled as one, and we do not publish sponsored calculators without saying so.
Sources
We prefer primary sources and name them on the page. Where we give a benchmark, we say where it comes from and when it was published.
Updates and “last checked” dates
Each calculator page shows when its formula and sources were last checked. We change that date only when the check really happened. A page that has not been checked for a long time is flagged for review.
Corrections
When we find or are told about a mistake, we fix it promptly. If a correction changes what a result means, we note it on the page. Report a problem to hello@webtilly.com.
Reviewers
Pages that an independent professional has checked say so, with the reviewer named. See the reviewers page for how that works.