# SlimSpace vs Compress PDF reduce pdf size

SlimSpace and Compress PDF reduce pdf size both sit at 4.6 stars, but that hides the real split: 67% of SlimSpace's written reviews are positive against 0% of Compress PDF reduce pdf size's. SlimSpace also leads on ratings volume (999 vs 37). Compress PDF reduce pdf size's advantage is ads (none vs shown). On price, rating, update cadence 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 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.

On the App Store both sit at effectively the same score — 4.6 for SlimSpace against 4.5 for Compress PDF reduce pdf size. That said, the two scores are not equally well evidenced: SlimSpace has 999 ratings behind it against 37, 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 0% of Compress PDF reduce pdf size's.

SlimSpace ships an update every 2 weeks, Compress PDF reduce pdf size every 3 weeks. Both last shipped on October 24, 2026.

## The numbers

| Metric | SlimSpace | Compress PDF reduce pdf size |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (999 ratings)](https://appshunter.io/ios/app/slimspace-compressor/id1232910576/reviews)** | [4.5 (37 ratings)](https://appshunter.io/ios/app/compress-pdf-reduce-pdf-size/id6478926009/reviews) |
| Number of ratings | **999** | 37 |
| Positive reviews | **67.3% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Monetization | Freemium | Free with in-app purchases |
| Size | 41 MB | 20 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [HappyTimes Tech Co., Ltd.](https://appshunter.io/developer/1455774641) | [Nouhayla Moustaine](https://appshunter.io/developer/1721912925) |

## 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


### 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, Vision Pro support

**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 SlimSpace free?

SlimSpace 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, SlimSpace or Compress PDF reduce pdf size?

SlimSpace is rated higher. SlimSpace averages 4.6 out of 5 from 999 ratings, while Compress PDF reduce pdf size averages 4.5 from 37 ratings.

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

SlimSpace shows ads; Compress PDF reduce pdf size does not.

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

SlimSpace ships an update every 2 weeks, and Compress PDF reduce pdf size every 3 weeks. Most recently, SlimSpace was updated on October 24, 2026 and Compress PDF reduce pdf size on October 24, 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.*