# MSRX PDF Compressor vs PDF Guru：Sign & Watermark

The clearest difference is in-app purchases: MSRX PDF Compressor at none against PDF Guru：Sign & Watermark's 4. PDF Guru：Sign & Watermark's advantage is update cadence (every 3 weeks vs every 5 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. PDF Guru：Sign & Watermark sells 4 in-app purchases, starting at $9.99 per 7 days. MSRX PDF Compressor asks for nothing beyond the download.

MSRX PDF Compressor ships an update every 5 months, PDF Guru：Sign & Watermark every 3 weeks. The most recent releases landed on October 31, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | MSRX PDF Compressor | PDF Guru：Sign & Watermark |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (4 ratings)](https://appshunter.io/ios/app/pdf-gurusign-and-watermark/id6800982594/reviews)** |
| Number of ratings | — | **4** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 7 MB | 203 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Mrinal Singh Raja](https://appshunter.io/developer/1879524280) | [Sharpmobi ltd](https://appshunter.io/developer/1671981018) |

## What reviewers say

### MSRX PDF Compressor

[App page](https://appshunter.io/ios/app/msrx-pdf-compressor/id6759563556)

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

**In-app purchases:** none


### PDF Guru：Sign & Watermark

[App page](https://appshunter.io/ios/app/pdf-gurusign-and-watermark/id6800982594)

Easily scan, edit, and organize PDF documents. Add custom watermarks, logos, and signatures to professionalize your files. Convert various formats to PDF and manage your documents efficiently.

**Highlights:** AI-powered PDF scanning, Custom text and logo watermarks, Electronic signatures and annotations, PDF merging, splitting, and compression, OCR text recognition, File conversion to PDF, Document organization and search

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Features | $9.99 | per 7 days |
| Unlock All Features | $9.99 | per 7 days |
| Unlock All Features | $9.99 | per 7 days |
| Unlock All Features | $59.99 | per year |


## Frequently asked questions

### Is MSRX PDF Compressor free?

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

### Is PDF Guru：Sign & Watermark free?

PDF Guru：Sign & Watermark is free to download, with in-app purchases available.

### Do MSRX PDF Compressor or PDF Guru：Sign & Watermark have ads?

Neither MSRX PDF Compressor nor PDF Guru：Sign & Watermark shows ads.

### Which is updated more often, MSRX PDF Compressor or PDF Guru：Sign & Watermark?

MSRX PDF Compressor ships an update every 5 months, and PDF Guru：Sign & Watermark every 3 weeks. Most recently, MSRX PDF Compressor was updated on October 31, 2026 and PDF Guru：Sign & Watermark on November 10, 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.*