# PDFOptim vs Compress PDF reduce pdf size

The clearest difference is review sentiment: PDFOptim at 76% against Compress PDF reduce pdf size's 0%. PDFOptim also leads on rating (4.7 vs 4.5) and ratings volume (292 vs 25). Compress PDF reduce pdf size's advantage is update cadence (every 3 weeks vs every 5 months). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. PDFOptim sells 3 in-app purchases, starting at $0.99 per month and Compress PDF reduce pdf size sells 4 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

PDFOptim holds the better App Store score, 4.7 against 4.5. That said, the two scores are not equally well evidenced: PDFOptim has 292 ratings behind it against 25, so its average is the more settled of the two. Written reviews point the same way: 76% of PDFOptim's written reviews are positive against 0% of Compress PDF reduce pdf size's.

PDFOptim ships an update every 5 months, Compress PDF reduce pdf size every 3 weeks. The most recent releases landed on September 21, 2026 and September 6, 2026 respectively.

## The numbers

| Metric | PDFOptim | Compress PDF reduce pdf size |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (292 ratings)](https://appshunter.io/ios/app/pdfoptim/id903356489/reviews)** | [4.5 (25 ratings)](https://appshunter.io/ios/app/compress-pdf-reduce-pdf-size/id6478926009/reviews) |
| Number of ratings | **292** | 25 |
| Positive reviews | **75.6% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 8 MB | 20 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [RootRise Technologies Pvt. Ltd.](https://appshunter.io/developer/594431033) | [Nouhayla Moustaine](https://appshunter.io/developer/1721912925) |

## 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)


### Compress PDF reduce pdf size

[App page](https://appshunter.io/ios/app/compress-pdf-reduce-pdf-size/id6478926009)

Easily reduce the size of your PDF files by up to 95% with multiple compression levels. Share your smaller PDF documents quickly and efficiently. Offers a clean and user-friendly interface for fast processing.

**Highlights:** Compress PDFs up to 95%, Multiple compression levels, Fast and easy to use, Share compressed files, Nice design

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Week | $1.99 | per 7 days |
| Month | $3.99 | per month |
| Year | $19.99 | per year |
| Lifetime | $24.99 | one-time |


## Frequently asked questions

### Is PDFOptim free?

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

### Is Compress PDF reduce pdf size free?

Compress PDF reduce pdf size is free to download, with in-app purchases available.

### Which has better reviews, PDFOptim or Compress PDF reduce pdf size?

PDFOptim is rated higher. PDFOptim averages 4.7 out of 5 from 292 ratings, while Compress PDF reduce pdf size averages 4.5 from 25 ratings.

### Do PDFOptim or Compress PDF reduce pdf size have ads?

Neither PDFOptim nor Compress PDF reduce pdf size shows ads.

### Which is updated more often, PDFOptim or Compress PDF reduce pdf size?

PDFOptim ships an update every 5 months, and Compress PDF reduce pdf size every 3 weeks. Most recently, PDFOptim was updated on September 21, 2026 and Compress PDF reduce pdf size on September 6, 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.*