StampName ( https://stampname.app ) is a native Swift macOS utility (macOS 26 or later) that batch-renames invoice and receipt PDFs on-device, with no cloud uploads or LLM calls. It reads the native PDF text layer, or runs Apple's Vision text recognition on scanned paper receipts, and applies deterministic Swift extraction rules to turn the printed date, vendor, invoice or reference number, amount, currency, and expense category into a clean filename such as 2026-03-31_GitHub_INV-401928_21.00USD.pdf . Every extracted value is outlined in colour on the PDF preview, and uncertain fields pause in amber for one-click selection. Name collisions get a suffix like _(2) instead of overwriting anything. Every rename is logged to a local SQLite undo journal, and undo checks inode and hash before it restores a name.…