Most camera apps save a picture of your document. A real PDF scanner produces a document — multi-page, compressed, searchable, and ready for the workflow it's about to enter. Three things separate the two.
Edges detected, perspective straightened, shadows removed. Each scan looks like it came off a flatbed, not out of your pocket. Contracts read like contracts again.
Ten pages of a lease agreement belong in one file, not ten photos in your camera roll. ScanLens batches pages, reorders them, and wraps them as a single multi-page PDF.
On-device OCR drops an invisible text layer behind every page. Cmd-F in any PDF reader finds the clause you need. Copy-paste works. The scan behaves like text.
Every scan is different. Legal archives need every pixel. A receipt headed for Slack needs to fit under 500 KB. ScanLens gives you control over the quality-to-size tradeoff with three presets — or a custom slider when you need it.
Scanning and OCR run on your iPhone. Cloud backup and linked accounts are optional, and document files are uploaded only when you enable backup or choose a cloud destination. ScanLens uses a limited anonymous backend identity for app functions and entitlements. Optional account data and document metadata may be handled through Supabase; purchases, diagnostics, product interaction, and attribution data are handled as described in the Privacy Policy .
ScanLens plugs into iOS's share sheet and every cloud drive you already use. One PDF, seven destinations, zero copy-paste.
Everything — scanning, compression, signing, export — stays inside a single app. No jumping across four tools to produce one signed and archived PDF.
A PDF scanner app on iPhone does four jobs the stock camera cannot. It detects the four corners of a document inside the live viewfinder and ignores the table, hand, or carpet around it. It applies perspective correction so a page captured at an angle ends up as a flat rectangle, not a trapezoid. It assembles multiple page images into a single multi-page PDF in capture order, with batch mode for long documents. And it runs on-device OCR through Apple's Vision framework to add an invisible text layer behind every page, so the resulting PDF is searchable in Preview, Files, or any standard PDF reader. ScanLens does all four locally — no upload, no account, no network call.
The iPhone already ships with a basic scanner. In the Notes app, the camera button reveals a Scan Documents option; in the Files app, the same flow lives under the three-dot menu in the top-right. Both use the same underlying capture engine, both produce a multi-page PDF, and both are free. For a one-off scan of a single receipt that you'll forward in Mail right away, they are enough.
A dedicated PDF scanner app earns its place when the file leaves the iPhone in something other than a fresh email. Notes and Files give you a PDF, but they do not give you on-device OCR with a searchable text layer, named files instead of "Scanned Document.pdf", per-page reordering after capture, page-level compression presets, PDF archival export, password protection at the file level, or a saved signature you can drop on the last page. They also bury the result inside Notes' note hierarchy or Files' folder structure — neither shows the scan as a first-class document with its own thumbnail and metadata.
The honest split: Notes/Files for casual one-offs, a standalone scanner like ScanLens when the scan needs to be searchable, named, signed, compressed, or archived. Both options keep processing on the device — no cloud upload either way.
End-to-end, a five-page document is captured, cleaned, OCR'd, and shared in about a minute. Six steps, no app switching.
| Step | Action | Tips |
|---|---|---|
| 1 | Open ScanLens and tap the camera | Lay the page on a contrasting surface — dark table, light page, or vice versa — for cleaner edge detection |
| 2 | Hold steady until the auto-capture fires | Or tap the shutter for manual. Batch mode keeps the camera open between pages — useful for contracts |
| 3 | Confirm the detected edges | Drag the four corners if the auto-detect missed; ScanLens straightens the perspective once you confirm |
| 4 | Pick a color profile and reorder pages | Black-and-white for receipts, color for IDs and photos, grayscale for contracts. Drag thumbnails to reorder |
| 5 | Choose compression and OCR language | Balanced is the default; pick Maximum for archives. OCR auto-detects, but you can force a script for mixed pages |
| 6 | Export as PDF and share | Standard PDF for email, PDF for archives, password-protected PDF for confidential files. iOS share sheet handles delivery |
Signed agreements, NDAs, vendor invoices, purchase orders, and meeting handouts that arrive on paper and need to live in a project folder. Batch mode captures a twenty-page contract in one session; OCR makes every clause searchable so Cmd-F finds the indemnification paragraph six months later. Grayscale compression keeps the file small enough to attach to email without splitting. For workflows that move between desk and field, the business document scanner guide goes deeper on naming conventions and folder structures.
Receipts curl, fade, and disappear from wallets. Scan them the moment you get them, file them into a Receipts folder in iCloud Drive, and let OCR pick up the date, total, and merchant for later search. Minimum compression keeps a month of receipts under 5 MB — small enough to attach to a single expense-report email. For pages that need to be merged before submission, the PDF editing guide covers reorder, rotate, and combine.
1099s, W-2s, bank statements, mortgage docs, and the paper trail behind every Schedule C deduction. PDF export is the right choice here — the format is built for ISO-standard long-term preservation, so a tax archive from 2026 still opens correctly in 2036. AES-256 password protection layers on top when the file leaves the device. Pair with the searchable PDF workflow so the entire tax folder is grep-able when an auditor asks for a specific transaction.
Passport bio page, driver's license, insurance card, vaccination certificate, hotel booking confirmation. Scan once, keep a password-protected PDF in a Travel folder, share a copy with a partner or family member by AirDrop. On-device processing matters most here — government ID images should never sit unencrypted on a third-party server. After capture, drop a signature on a notarized copy with the PDF signing flow.
Standard PDF for day-to-day work, plus PDF for long-term archival. You choose the format at export — the same scan can produce either output without re-scanning.
Yes. On-device OCR adds an invisible text layer behind every page image, so the PDF stays visually identical to the scan while becoming fully searchable in any reader.
Three presets — Maximum (archive-grade), Balanced (default), Minimum (email-sized) — plus a custom slider. The engine applies different compression to text regions and photo regions within the same page, so you get small files without blurry text.
Yes. AES-256 password protection, set at export. You can require one password to open the document and a separate, stronger password to allow editing or printing.
ScanLens handles long-form capture — lengthy contracts and multi-page reports — with batch mode and auto-capture. Up to 100 pages per document.
Yes. Every step — capture, edge detection, perspective correction, OCR, compression, export — runs on the iPhone's Neural Engine. The app needs no network connection, no account, and no sign-in. Documents never leave the device unless you share them yourself.
14, including Latin-script languages, Cyrillic, Greek, Chinese (Simplified and Traditional), Japanese, Korean, Arabic, Hebrew, Thai, and Vietnamese. Multi-language pages are detected automatically — a single scan can contain three scripts and all of them stay searchable. The recognition runs through Apple's Vision framework on-device.
Yes, within the scope of a flat-PDF tool. Reorder pages, delete pages, rotate, add new pages from a fresh scan, drop a signature, annotate, and re-export. For deeper edits — typing into form fields, redacting sensitive lines — see the PDF editing and PDF signing workflows.
