Turns your measured before/after quantities into signed changes, percentage arithmetic and a factual CV evidence sentence. A zero baseline has no defined percentage; numerically unrepresentable ratios are rejected. It does not label changes as improvements, invent impact or claim causation. Uses only adult user-controlled facts; review the result. No external lookup, storage or sending. Uses explicitly supplied structured inputs. Server computations are transient; the standalone website computes locally in your browser. Review the output before exporting it. No persistent account records, external source retrieval, sending, transactions or paid model calls. CSV/JSON review and export are available on the standalone website. MCP requests are capped at 128 KiB and computed responses at 256 KiB; individual field and record limits also apply.