PDFThis

Phone camera vs document scanner.

Honest comparison. With numbers.

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The problem

You're deciding whether to buy a flatbed scanner, a sheetfed scanner, or just use your phone. The pitch from scanner manufacturers is that real scanners are superior. The pitch from app makers is that phones are good enough. Neither is being fully honest with you — they're both selling something.

The fix

Phone cameras have caught up enough that they're the right answer for most people most of the time. A real scanner still wins on three things: very small or low-contrast text, batch-scanning dozens of pages quickly, and preserving exact color fidelity for photos and art. For everyday documents — letters, forms, receipts, IDs — a 2020-or-newer phone camera plus a free web tool like PDFThis produces output that's indistinguishable from a $200 sheetfed scanner.

What you get

  • Phone camera quality: 12-50 megapixels on modern phones, vs. ~9 megapixels (300 DPI at Letter size) on a flatbed scanner — the phone has more raw resolution.
  • Real scanner wins: even, controlled lighting that eliminates shadows; phones depend on processing (which PDFThis does for you).
  • Cost: $0 (phone you already own) vs $80-300 for a basic scanner. Worth it only if you scan 50+ pages per week.
  • Speed: phone + web tool is ~10 seconds per page; sheetfed scanner is ~3 seconds per page. Flatbed scanners are slower than phones for one-off scans.

Questions

Related

Scan a document with your phone.
No app to install. No account to make.
Photo to PDF.
Phone camera in. Clean PDF out.
Scan receipts. File them.
Free. Audit-ready. No app.

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Last updated: May 2026