Formula-driven tools use transparent calculations. Live-data tools use external providers. Tax, legal and medical tools should only be published with verified, current sources and appropriate disclaimers.
Formula-driven tools use transparent calculations. Live-data tools use external providers. Tax, legal and medical tools should only be published with verified, current sources and appropriate disclaimers.
Each production calculator should disclose its formula or source where appropriate, and country-specific tools should show jurisdiction, effective date and last-reviewed date.