# PDFOptim vs PDF Compressor－Compress PDF

PDFOptim and PDF Compressor－Compress PDF both sit at 4.7 stars, but that hides the real split: 76% of PDFOptim's written reviews are positive against 29% of PDF Compressor－Compress PDF's. PDFOptim also leads on ads (none vs shown). PDF Compressor－Compress PDF's advantage is update cadence (every 2 months vs every 5 months). On price, rating, ratings volume and in-app purchases there is nothing between them.

Both are free to download. PDFOptim sells 3 in-app purchases, starting at $0.99 per month and PDF Compressor－Compress PDF sells 4 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.7 for PDFOptim against 4.6 for PDF Compressor－Compress PDF. Both are backed by a comparable volume of ratings — 292 and 146 respectively. Written reviews are what separate them: 76% of PDFOptim's written reviews are positive against 29% of PDF Compressor－Compress PDF's.

PDFOptim ships an update every 5 months, PDF Compressor－Compress PDF every 2 months. The most recent releases landed on September 21, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | PDFOptim | PDF Compressor－Compress PDF |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (292 ratings)](https://appshunter.io/ios/app/pdfoptim/id903356489/reviews)** | [4.6 (146 ratings)](https://appshunter.io/ios/app/pdf-compressorcompress-pdf/id6748140542/reviews) |
| Number of ratings | **292** | 146 |
| Positive reviews | **75.6% of reviews** | 28.6% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Every 2 months** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 8 MB | 30 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [RootRise Technologies Pvt. Ltd.](https://appshunter.io/developer/594431033) | [EclixTech UK LTD](https://appshunter.io/developer/1824450302) |

## What reviewers say

### PDFOptim

[App page](https://appshunter.io/ios/app/pdfoptim/id903356489)

Easily compress and optimize PDF files on your iPhone and iPad. Reduce the size of large documents, saving storage space and transmission time. Offers both automatic and manual compression modes with advanced settings for image and vector graphics.

**Highlights:** Compress PDF documents, Optimize PDF files, Automatic compression mode, Manual compression mode, Adjust image resolution and quality, Optimize vector graphics, Support for password-protected PDFs

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium : Monthly Access | $0.99 | per month |
| Premium : Yearly Access | $2.99 | per year |
| Premium : Lifetime Access | $4.99 | one-time |

**What reviewers like**

- 👍 Excellent compression quality
- 🚀 Efficient and fast performance
- 👍 Simple and easy to use
- 💰 Good value for money (one-time purchase)
- 👍 No annoying subscriptions

**What reviewers complain about**

- 🐛 App not launching/freezing
- 🐛 Doesn't work for certain file types (e.g., GoodNotes)
- 🐛 Poor image quality/pixelation
- 🐛 Compression not effective on all PDFs
- 🐛 Confusing or illogical interface

**Reported bugs**

- App not launching on iOS 18.0.1
- App freezes during launch
- App won't take purchases
- Cannot optimize certain PDFs
- Compression not effective on marked-up PDFs

**Requested features**

- Support for iOS shortcuts
- macOS version integration/cross-platform compatibility
- Improved handling of specific file types like GoodNotes
- Better optimization for handwritten notes within PDFs
- Cloud storage for compressed documents (iCloud)


### PDF Compressor－Compress PDF

[App page](https://appshunter.io/ios/app/pdf-compressorcompress-pdf/id6748140542)

Easily reduce the size of your PDF files without sacrificing quality. This tool helps you shrink PDFs for faster sharing, emailing, or uploading, saving valuable storage space. It's perfect for managing large documents and scanned files efficiently.

**Highlights:** Compress PDF files without losing clarity, Smart compressor for scanned or large documents, Reduce PDF size for easy upload and sharing, Free compressor with high quality output, Preserve text and image quality, Choose compression level

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $4.99 | per 7 days |
| Monthly Subscription | $9.99 | per month |
| Yearly Subscription | $19.99 | per year |
| Yearly Subscription | $39.99 | per year |


## Frequently asked questions

### Is PDFOptim free?

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

### Is PDF Compressor－Compress PDF free?

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

### Which has better reviews, PDFOptim or PDF Compressor－Compress PDF?

PDFOptim is rated higher. PDFOptim averages 4.7 out of 5 from 292 ratings, while PDF Compressor－Compress PDF averages 4.6 from 146 ratings.

### Do PDFOptim or PDF Compressor－Compress PDF have ads?

PDF Compressor－Compress PDF shows ads; PDFOptim does not.

### Which is updated more often, PDFOptim or PDF Compressor－Compress PDF?

PDFOptim ships an update every 5 months, and PDF Compressor－Compress PDF every 2 months. Most recently, PDFOptim was updated on September 21, 2026 and PDF Compressor－Compress PDF on September 29, 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.*