# PDF OCR vs A4妙排

The clearest difference is in-app purchases: A4妙排 at none against PDF OCR's 3. A4妙排 also leads on update cadence (daily vs every 3 weeks) and iOS requirement (13.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. PDF OCR sells 3 in-app purchases, starting at $3.99 per month. A4妙排 asks for nothing beyond the download.

PDF OCR ships an update every 3 weeks, A4妙排 daily. The most recent releases landed on October 25, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | PDF OCR | A4妙排 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (7 ratings)](https://appshunter.io/ios/app/pdf-ocr-scanner-and-editor/id6738633268/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Daily** |
| Monetization | Free | — |
| Size | 7 MB | 55 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Layerz Corp.](https://appshunter.io/developer/1617729865) | [一鸣 刘](https://appshunter.io/developer/1786386100) |

## 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 (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PDF OCR Pro Monthly | $3.99 | per month |
| PDF OCR Pro Yearly | $19.99 | per year |
| PDF OCR Pro Lifetime | $49.99 | one-time |


### A4妙排

[App page](https://appshunter.io/ios/app/a4-a3a4pdf/id6745166406)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PDF OCR free?

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

### Is A4妙排 free?

A4妙排 is free to download, with no in-app purchases.

### Do PDF OCR or A4妙排 have ads?

Neither PDF OCR nor A4妙排 shows ads.

### Which is updated more often, PDF OCR or A4妙排?

PDF OCR ships an update every 3 weeks, and A4妙排 daily. Most recently, PDF OCR was updated on October 25, 2026 and A4妙排 on October 28, 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.*