- Adobe Scan: free, clean PDFs, the default recommendation.
- Microsoft Lens: free, great perspective correction.
- PassportPower: organizes scans per traveler against the actual checklist, $9.99 one-time per destination.
- Apple Notes scanner: free, built in, good enough.
- Google Drive: storage plus sharing for groups.
- 1Password: secure storage for passport numbers and references.
- CamScanner: free tier works; paid adds OCR most travelers never need.
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Sources: U.S. State Department, IATA Travel Centre
Seven apps, one workflow: scan once in color, name the file clearly (passport-john-2026.pdf, not scan001.pdf), store per traveler, and keep offline copies. The organization system beats the scanner app every time. A perfectly scanned document you cannot find at the airport is the same as no document.