# PDF OCR Pro vs ScanBig

The clearest difference is in-app purchases: PDF OCR Pro at none against ScanBig's 1. PDF OCR Pro also leads on ratings volume (6 vs 1). ScanBig's advantage is iOS requirement (15.6 vs 17.0). On price, rating, update cadence and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for PDF OCR Pro against 5.0 for ScanBig. That said, the two scores are not equally well evidenced: PDF OCR Pro has 6 ratings behind it against 1, so its average is the more settled of the two.

Both ship on a similar rhythm, roughly fortnightly. The most recent releases landed on August 17, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | PDF OCR Pro | ScanBig |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (6 ratings)](https://appshunter.io/ios/app/pdf-ocr-pro/id6738633268/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/scanbig/id6739180761/reviews) |
| Number of ratings | **6** | 1 |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | Fortnightly |
| Monetization | **Free** | Free with in-app purchases |
| Size | 6 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 Pro

[App page](https://appshunter.io/ios/app/pdf-ocr-pro/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, 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 Pro free?

PDF OCR Pro 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 Pro or ScanBig?

PDF OCR Pro and ScanBig are both rated 5.0 out of 5 on the App Store, from 6 and 1 ratings respectively.

### Do PDF OCR Pro or ScanBig have ads?

Neither PDF OCR Pro nor ScanBig shows ads.

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

PDF OCR Pro ships an update fortnightly, and ScanBig fortnightly. Most recently, PDF OCR Pro was updated on August 17, 2026 and ScanBig on September 11, 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.*