# PDFToolbox vs PDF Compressor

The clearest difference is update cadence: PDF Compressor at every 3 months against PDFToolbox's every 7 months. PDFToolbox's advantage is iOS requirement (15.0 vs 17.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. PDFToolbox sells 3 in-app purchases, starting at $0.99 per 7 days and PDF Compressor sells 2 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

PDFToolbox ships an update every 7 months, PDF Compressor every 3 months. The most recent releases landed on October 13, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | PDFToolbox | PDF Compressor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/pdftoolbox-converterwatermark/id6744648102/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 months** |
| Monetization | Free with in-app purchases | — |
| Size | 8 MB | 2 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [钊辰 王](https://appshunter.io/developer/1791406641) | [Vikram Singh](https://appshunter.io/developer/1800895019) |

## What reviewers say

### PDFToolbox

[App page](https://appshunter.io/ios/app/pdftoolbox-converterwatermark/id6744648102)

This app offers a suite of tools for local PDF processing, including converting PDFs to images and vice versa, adding text watermarks, and encrypting/decrypting documents with passwords. It prioritizes user privacy by performing all operations on the device without internet access.

**Highlights:** Convert PDF to Image (JPG, PNG, GIF), Convert Image to PDF, Add custom text watermarks, Encrypt PDFs with passwords, Remove PDF password protection, Batch export and multi-image processing

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $0.99 | per 7 days |
| Yearly | $9.99 | per year |
| Lifetime | $29.99 | one-time |


### PDF Compressor

[App page](https://appshunter.io/ios/app/pdf-compressor-compresso/id6755685415)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CrushPDF Premium Weekly | $2.99 | per 7 days |
| CrushPDF Premium Annual | $19.99 | per year |


## Frequently asked questions

### Is PDFToolbox free?

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

### Is PDF Compressor free?

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

### Do PDFToolbox or PDF Compressor have ads?

Neither PDFToolbox nor PDF Compressor shows ads.

### Which is updated more often, PDFToolbox or PDF Compressor?

PDFToolbox ships an update every 7 months, and PDF Compressor every 3 months. Most recently, PDFToolbox was updated on October 13, 2026 and PDF Compressor on October 4, 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.*