# PDF OCR vs ScanBig

The clearest difference is rating: ScanBig at 5.0 against PDF OCR's 4.4. ScanBig also leads on iOS requirement (15.6 vs 17.0). PDF OCR's advantage is in-app purchases (none vs 1) and ratings volume (7 vs 1). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. ScanBig sells 1 one-off in-app purchase. PDF OCR asks for nothing beyond the download.

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 every 3 weeks, ScanBig fortnightly. The most recent releases landed on October 17, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | PDF OCR | ScanBig |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (7 ratings)](https://appshunter.io/ios/app/pdf-ocr-scanner-and-editor/id6738633268/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/scanbig/id6739180761/reviews)** |
| Number of ratings | **7** | 1 |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 7 MB | 28 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Layerz Corp.](https://appshunter.io/developer/1617729865) | [杭州引力网络技术有限公司](https://appshunter.io/developer/1133518651) |

## What reviewers say

### PDF OCR

[App page](https://appshunter.io/ios/app/pdf-ocr-scanner-and-editor/id6738633268)

This app offers a comprehensive suite of tools for managing PDF files. It allows you to extract text using OCR, convert PDFs to images, secure documents with passwords, and merge or split files. It also enables creating PDFs from images and converting webpages into PDF format, all while ensuring your data remains private through offline processing.

**Highlights:** Extract text with OCR, Convert PDF to images, Secure PDFs with passwords, Merge or split PDFs, Create PDFs from images, Convert webpages to PDF, Compress file size

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases:** none


### ScanBig

[App page](https://appshunter.io/ios/app/scanbig/id6739180761)

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.

**Highlights:** Smart scanning for large files, Supports photos and videos, Quick deletion of unwanted files, iCloud integration, Multilingual support

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ScanBig VIP | $3.99 | one-time |


## Frequently asked questions

### Is PDF OCR free?

PDF OCR is free to download, with no in-app purchases.

### Is ScanBig free?

ScanBig is free to download, with in-app purchases available.

### Which has better reviews, PDF OCR or ScanBig?

ScanBig is rated higher. PDF OCR averages 4.4 out of 5 from 7 ratings, while ScanBig averages 5.0 from 1 ratings.

### Do PDF OCR or ScanBig have ads?

Neither PDF OCR nor ScanBig shows ads.

### Which is updated more often, PDF OCR or ScanBig?

PDF OCR ships an update every 3 weeks, and ScanBig fortnightly. Most recently, PDF OCR was updated on October 17, 2026 and ScanBig on October 16, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*