# Smart PDF Compressor vs PDF Shrink

Smart PDF Compressor and PDF Shrink are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Smart PDF Compressor ships an update every 9 days, PDF Shrink every 2 weeks. The most recent releases landed on October 31, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Smart PDF Compressor | PDF Shrink |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 2 weeks |
| Size | 4 MB | 1 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Quan Dang](https://appshunter.io/developer/1868401962) | [宏华 胡](https://appshunter.io/developer/1868280133) |

## What reviewers say

### Smart PDF Compressor

[App page](https://appshunter.io/ios/app/smart-pdf-compressor-reduce/id6757997785)

**Features:** macOS Compatibility

**In-app purchases:** none


### PDF Shrink

[App page](https://appshunter.io/ios/app/pdf-shrink-offline-compress/id6782493416)

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

**In-app purchases:** none


## Frequently asked questions

### Is Smart PDF Compressor free?

Smart PDF Compressor is free to download, with no in-app purchases.

### Is PDF Shrink free?

PDF Shrink is free to download, with no in-app purchases.

### Do Smart PDF Compressor or PDF Shrink have ads?

Neither Smart PDF Compressor nor PDF Shrink shows ads.

### Which is updated more often, Smart PDF Compressor or PDF Shrink?

Smart PDF Compressor ships an update every 9 days, and PDF Shrink every 2 weeks. Most recently, Smart PDF Compressor was updated on October 31, 2026 and PDF Shrink on October 25, 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.*