# PDF Compressor vs PDF Merge

The clearest difference is rating: PDF Merge at 4.6 against PDF Compressor's 4.1. PDF Merge also leads on update cadence (weekly vs every 3 weeks). PDF Compressor's advantage is in-app purchases (none vs 4) and review sentiment (18% vs 0%). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. PDF Merge sells 4 in-app purchases, starting at $4.99 per 7 days. PDF Compressor asks for nothing beyond the download.

PDF Merge holds the better App Store score, 4.6 against 4.1. That said, the two scores are not equally well evidenced: PDF Compressor has 56 ratings behind it against 11, so its average is the more settled of the two. Written reviews complicate that: 18% of PDF Compressor's written reviews are positive against 0% of PDF Merge's, so the app with the better star average is not the one people write more warmly about.

PDF Compressor ships an update every 3 weeks, PDF Merge weekly. The most recent releases landed on August 29, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | PDF Compressor | PDF Merge |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.1 (56 ratings)](https://appshunter.io/ios/app/pdf-compressor/id6446500701/reviews) | **[4.6 (11 ratings)](https://appshunter.io/ios/app/pdf-merge-document-sign-pdf/id6475400436/reviews)** |
| Number of ratings | **56** | 11 |
| Positive reviews | **18.2% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 3 MB | 27 MB |
| Requires iOS | 16.1 | **15.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [HurryApp LTD](https://appshunter.io/developer/1562864305) | [AppFlux Labs](https://appshunter.io/developer/1882687293) |

## What reviewers say

### PDF Compressor

[App page](https://appshunter.io/ios/app/pdf-compressor/id6446500701)

This utility allows users to compress, merge, and share PDF documents efficiently. It provides a convenient way to manage your PDF files on the go.

**Highlights:** Compress PDF files, Merge PDF files, Share PDF files, Manage PDF documents, Mobile PDF utility

**Features:** Vision Pro support

**In-app purchases:** none


### PDF Merge

[App page](https://appshunter.io/ios/app/pdf-merge-document-sign-pdf/id6475400436)

Easily merge multiple PDF files into one cohesive document or split large PDFs into smaller sections. This app also allows you to fill out forms and add your signature directly within the application.

**Highlights:** Merge multiple PDFs, Split large PDFs, Fill and sign documents, Convert images to PDF, User-friendly interface

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Access | $4.99 | per 7 days |
| Unlimited Access | $5.99 | per month |
| Unlimited Access | $24.99 | per year |
| Lifetime Premium | $29.99 | one-time |


## Frequently asked questions

### Is PDF Compressor free?

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

### Is PDF Merge free?

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

### Which has better reviews, PDF Compressor or PDF Merge?

PDF Merge is rated higher. PDF Compressor averages 4.1 out of 5 from 56 ratings, while PDF Merge averages 4.6 from 11 ratings.

### Do PDF Compressor or PDF Merge have ads?

Neither PDF Compressor nor PDF Merge shows ads.

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

PDF Compressor ships an update every 3 weeks, and PDF Merge weekly. Most recently, PDF Compressor was updated on August 29, 2026 and PDF Merge on September 20, 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.*