# SlimSpace vs PDF Compress

The clearest difference is review sentiment: SlimSpace at 67% against PDF Compress's 0%. SlimSpace also leads on rating (4.6 vs 2.0) and update cadence (every 2 weeks vs every 3 months). PDF Compress's advantage is ads (none vs shown). On price, in-app purchases, monetization model and device support 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 Compress sells 3 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

SlimSpace holds the better App Store score, 4.6 against 2.0. That said, the two scores are not equally well evidenced: SlimSpace has 998 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 67% of SlimSpace's written reviews are positive against 0% of PDF Compress's.

SlimSpace ships an update every 2 weeks, PDF Compress every 3 months. The most recent releases landed on October 13, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | SlimSpace | PDF Compress |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (998 ratings)](https://appshunter.io/ios/app/slimspace-compressor/id1232910576/reviews)** | [2.0 (1 ratings)](https://appshunter.io/ios/app/pdf-compress-size-compressor/id6642679859/reviews) |
| Number of ratings | **998** | 1 |
| 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 months |
| Monetization | Freemium | Free with in-app purchases |
| Size | 41 MB | 6 MB |
| Requires iOS | **15.6** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [HappyTimes Tech Co., Ltd.](https://appshunter.io/developer/1455774641) | [Mohamed Oufqir](https://appshunter.io/developer/1750312649) |

## 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 Compress

[App page](https://appshunter.io/ios/app/pdf-compress-size-compressor/id6642679859)

This tool allows you to significantly reduce the size of PDF files, making them easier to share. It offers multiple compression levels and a user-friendly interface for quick and efficient file management. You can also rename and preview files before sharing.

**Highlights:** Compress PDF files to desired size, Multiple compression levels, User-friendly design, Fast and easy-to-use interface, Achieve over 90% compression, Rename PDF files, Preview PDF files

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Week | $1.99 | per 7 days |
| Month | $4.99 | per month |
| Year | $14.99 | per year |


## Frequently asked questions

### Is SlimSpace free?

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

### Is PDF Compress free?

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

### Which has better reviews, SlimSpace or PDF Compress?

SlimSpace is rated higher. SlimSpace averages 4.6 out of 5 from 998 ratings, while PDF Compress averages 2.0 from 1 ratings.

### Do SlimSpace or PDF Compress have ads?

SlimSpace shows ads; PDF Compress does not.

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

SlimSpace ships an update every 2 weeks, and PDF Compress every 3 months. Most recently, SlimSpace was updated on October 13, 2026 and PDF Compress on September 27, 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.*