# Unitloft vs PDF Compressor

The clearest difference is price: PDF Compressor at Free against Unitloft's $2.99. PDF Compressor also leads on iOS requirement (13.0 vs 17.0). Unitloft's advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support there is nothing between them.

PDF Compressor is free to download; Unitloft costs $2.99 up front. PDF Compressor sells 1 one-off in-app purchase. Unitloft asks for nothing beyond the download.

Unitloft ships an update fortnightly, PDF Compressor every 4 months. Both last shipped on October 31, 2026.

## The numbers

| Metric | Unitloft | PDF Compressor |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Fortnightly** | Every 4 months |
| Size | 5 MB | 50 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Robert Corbin](https://appshunter.io/developer/1890247992) | [STE DIGI VIBES](https://appshunter.io/developer/1769242851) |

## What reviewers say

### Unitloft

[App page](https://appshunter.io/ios/app/unitloft-unit-converter/id6776189469)

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

**In-app purchases:** none


### PDF Compressor

[App page](https://appshunter.io/ios/app/pdf-compressor-merge-and-scan/id6782072361)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads | $2.99 | one-time |


## Frequently asked questions

### Is Unitloft free?

Unitloft costs $2.99, with no in-app purchases.

### Is PDF Compressor free?

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

### Do Unitloft or PDF Compressor have ads?

PDF Compressor shows ads; Unitloft does not.

### Which is updated more often, Unitloft or PDF Compressor?

Unitloft ships an update fortnightly, and PDF Compressor every 4 months. Most recently, Unitloft was updated on October 31, 2026 and PDF Compressor on October 31, 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.*