Clear tools with visible methods and limits
How Sumplain creates, checks, translates, and maintains its calculators and explanations.
Who publishes Sumplain?
Sumplain is published by the Sumplain Editorial Team. The name identifies the team responsible for the site; it does not claim medical, financial, legal, or other professional credentials.
How tools are checked
Calculator logic is kept in testable code and checked with fixed examples and edge cases. Each tool page states its method, assumptions, limitations, and primary references so readers can inspect what the result means.
Translation and maintenance
Localized pages preserve the same tool identity, sources, and review date while using language-specific titles, explanations, and questions. A review date changes only when the corresponding content or method has been checked.
Privacy and corrections
Tool inputs are processed in the browser when the task can be completed locally. If an explanation or result appears wrong, contact the project owner through the repository so it can be investigated and corrected.