PDF OCR vs ScanBig
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PDF OCR
This app transforms your iPhone or iPad into a powerful PDF tool. Scan documents, recognize and edit text, convert files, and sign PDFs all on your device. It offers advanced features for annotation, measurement, and protection.
- Document scanning and text recognition (OCR)
- Edit text and images directly on the page
- Convert between PDF, Word, and Office formats
- Annotate with pens, highlighters, and shapes
- Fill and sign PDF forms
- Measure drawings to scale
- Password protection and redaction
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PDF OCR is the all-in-one PDF app for iPhone and iPad. Scan paper into searchable PDFs, read and mark up any document, edit text right on the page, measure drawings to scale, and convert between PDF, Word and Office files. Everything runs on your device, with no account and no uploads. SCAN & RECOGNIZE TEXT (OCR) • Document scanner: edges are found and pages are straightened for you • Text recognition: scans become searchable, selectable PDFs • Recognize text in scanned PDFs you already have • Scan many pages at once, then reorder, rotate or remove them • Read QR codes • Put two pages on one, like both sides of an ID card • Smart file names suggested from what was scanned (Pro) READ IN COMFORT • Fast viewer with search, contents and bookmarks • Continuous scroll, single page or two-page spread • Reading View: the text reflowed to fit your screen, in your size, font and theme • Night mode and read aloud • Opens where you left off; recent documents appear in Spotlight ANNOTATE & MARK UP • Pen and highlighter, smooth with Apple Pencil • Highlight, underline and strike through text • Notes, shapes, arrows, polygons and stamps • Select anything you added to move or resize it, with undo EDIT PDF LIKE A DOCUMENT (PRO) • Edit text right where it is, in the document's own fonts • Move, delete and add text and images • Redaction removes sensitive text and images for good MEASURE DRAWINGS (PRO) • Distance, perimeter, area and count on plans and drawings • Drawing scales such as 1:100, or calibrate to a length you know • Snaps to corners; totals and CSV export FILL & SIGN • Fill in PDF forms • Draw your signature once and place it on any document • Sign contracts, invoices and applications without a printer CONVERT • PDF to Word (Pro), images, text and RTF • Word, Excel, PowerPoint, Pages and Keynote files to PDF • Photos and web pages to PDF ORGANIZE & OPTIMIZE • Merge PDFs and images; split by selected pages, ranges or every N pages • Reorder, rotate, insert, crop and delete pages • Compress PDFs to make them smaller • Flatten annotations and forms, and print PROTECT • Protect PDFs with a password • Change permissions or remove security (Pro) • Watermarks and page numbers (Pro) • Lock the app with Face ID (Pro) SMART TOOLS, ON YOUR DEVICE • Summaries with Apple Intelligence (Pro; iOS 26 on supported devices) • Page translation (Pro) • Shortcuts actions for OCR, compression and merging (Pro) PRIVATE BY DESIGN Your documents never leave your device. Scanning, text recognition, editing, conversion and summaries all happen on the device. No account, and no watermark on your files. PDF OCR PRO Reading, markup, signatures, scanning and most tools are free, and OCR is free for up to 30 pages per document. Pro adds OCR without page limits, editing text and images, PDF to Word, measuring, advanced split, redaction, watermarks and page numbers, Face ID lock, smart file names, summaries and translation, and Shortcuts actions. Choose monthly, yearly with a 7-day free trial, or a one-time lifetime purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period, and can be managed in Settings › Apple Account › Subscriptions. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://layerz.app/pdfocr/privacy
ScanBig
This app helps you reclaim storage space by identifying and managing large media files like photos and videos. It offers smart scanning, quick deletion, and iCloud integration to efficiently clean up your device.
- Smart scanning for large files
- Supports photos and videos
- Quick deletion of unwanted files
- iCloud integration
- Multilingual support
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Large Media Finder Easily manage and clean up large files on your device for more efficient storage! Large Media Finder is a powerful tool designed to help you identify and manage large files, such as photos and videos, on your device. With its intelligent scanning feature, you can quickly locate the files taking up the most space and manage them with ease. Key Features: • Smart Scanning: Quickly scan your device to find the largest files, and view detailed information such as file size, type, and date. • Supports Various File Types: Manage common media files like photos and videos effortlessly. • Quick Deletion: Easily delete unnecessary large files to free up storage space. • iCloud Integration: Access, view, and manage files stored in iCloud seamlessly. • Multilingual Support: Available in English and Simplified Chinese to cater to a global audience. Who Is It For?: • Users running out of storage space. • Those who regularly organize their photos and videos. • Anyone looking to quickly find and remove large files. Download Large Media Finder now and give your device storage a fresh start!
Screenshots
Verdict
The clearest difference is rating: ScanBig at 5.0 against PDF OCR's 4.4. ScanBig also leads on update cadence (fortnightly vs monthly) and iOS requirement (15.6 vs 17.0). PDF OCR's advantage is ratings volume (7 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. PDF OCR sells 3 in-app purchases, starting at $3.99 per month and ScanBig sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
ScanBig holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: PDF OCR has 7 ratings behind it against 1, so its average is the more settled of the two.
PDF OCR ships an update monthly, ScanBig fortnightly. The most recent releases landed on November 5, 2026 and November 4, 2026 respectively.
| Parameter | PDF OCR | ScanBig |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (7 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 7 — better | 1 |
| Update frequency | Monthly | Fortnightly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 17.0 | 15.6 — better |
| Further details — not scored | ||
| Size | 9 MB | 28 MB |
| Age rating | 17+ | 4+ |
| Developer | Layerz Corp. | 杭州引力网络技术有限公司 |
Customer experience
PDF OCR
ScanBig
In-app purchases
PDF OCR
- PDF OCR Pro Monthly$3.991 Month
- PDF OCR Pro Yearly7 Days trial$19.991 Year
- PDF OCR Pro Lifetime$49.99
ScanBig
- ScanBig VIP$3.99








