# SlimSpace vs PDF Compressor－Compress PDF

SlimSpace and PDF Compressor－Compress PDF both sit at 4.6 stars, but that hides the real split: 67% of SlimSpace's written reviews are positive against 29% of PDF Compressor－Compress PDF's. SlimSpace also leads on update cadence (every 2 weeks vs every 2 months) and ratings volume (998 vs 146). On price, rating, ads and in-app purchases there is nothing between them.

Both are free to download. SlimSpace sells 4 in-app purchases, starting at $0.69 per 7 days and PDF Compressor－Compress PDF sells 4 in-app purchases, starting at $5.99 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 — 4.6 for SlimSpace against 4.6 for PDF Compressor－Compress PDF. That said, the two scores are not equally well evidenced: SlimSpace has 998 ratings behind it against 146, so its average is the more settled of the two. Written reviews are what separate them: 67% of SlimSpace's written reviews are positive against 29% of PDF Compressor－Compress PDF's.

SlimSpace ships an update every 2 weeks, PDF Compressor－Compress PDF every 2 months. The most recent releases landed on October 13, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | SlimSpace | PDF Compressor－Compress PDF |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (998 ratings)](https://appshunter.io/ios/app/slimspace-compressor/id1232910576/reviews) | [4.6 (146 ratings)](https://appshunter.io/ios/app/pdf-compressorcompress-pdf/id6748140542/reviews) |
| Number of ratings | **998** | 146 |
| Positive reviews | **67.3% of reviews** | 28.6% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 2 weeks** | Every 2 months |
| Monetization | Freemium | Free with in-app purchases |
| Size | 41 MB | 30 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [HappyTimes Tech Co., Ltd.](https://appshunter.io/developer/1455774641) | [EclixTech UK LTD](https://appshunter.io/developer/1824450302) |

## What reviewers say

### SlimSpace

[App page](https://appshunter.io/ios/app/slimspace-compressor/id1232910576)

Free up device storage by reducing the size of photos and videos. This app offers offline compression with advanced algorithms to maintain quality. It supports various file formats and includes tools for cleaning up your photo library.

**Highlights:** Offline compression, No watermark or time limits, Advanced quality preservation, Supports major file formats, Customizable compression settings, Batch compression, Album and screenshot cleaner

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade(1 Week) | $0.69 | per 7 days |
| Upgrade(1 Month) | $3.49 | per month |
| Compressor Vip(1 Year) | $6.49 | per year |
| Upgrade(Forever) | $18.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 🚀 Fast compression
- 💡 Useful compression options
- ✨ Good quality compression
- 💾 Saves storage space

**What reviewers complain about**

- 🐛 Crashes and freezes
- 💸 Aggressive upselling and ads
- 🔍 Confusing interface
- 🤔 Inconsistent performance
- 🔒 Unreliable paid features

**Reported bugs**

- Videos not resizing properly
- Compressed photos not saving to album
- Paid features not working as expected
- App crashing on launch or during compression
- Excessive data usage

**Requested features**

- Batch compression option
- More compression quality settings
- Ability to preview compressed files
- Support for more file types
- Improved error handling and feedback


### 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 | $5.99 | 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 SlimSpace free?

SlimSpace 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, SlimSpace or PDF Compressor－Compress PDF?

SlimSpace and PDF Compressor－Compress PDF are both rated 4.6 out of 5 on the App Store, from 998 and 146 ratings respectively.

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

Both SlimSpace and PDF Compressor－Compress PDF show ads.

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

SlimSpace ships an update every 2 weeks, and PDF Compressor－Compress PDF every 2 months. Most recently, SlimSpace was updated on October 13, 2026 and PDF Compressor－Compress PDF on October 14, 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.*