# ZappID vs PDF Compressor－Compress PDF

The clearest difference is in-app purchases: ZappID at none against PDF Compressor－Compress PDF's 4. ZappID also leads on ads (none vs shown) and update cadence (every 4 days vs every 2 months). PDF Compressor－Compress PDF's advantage is device support (4 vs 2). On price there is nothing between them.

Both are free to download. PDF Compressor－Compress PDF sells 4 in-app purchases, starting at $4.99 per 7 days. ZappID asks for nothing beyond the download.

ZappID ships an update every 4 days, PDF Compressor－Compress PDF every 2 months. The most recent releases landed on September 15, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | ZappID | PDF Compressor－Compress PDF |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.6 (146 ratings)](https://appshunter.io/ios/app/pdf-compressorcompress-pdf/id6748140542/reviews)** |
| Number of ratings | — | **146** |
| Positive reviews | — | 28.6% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 4 days** | Every 2 months |
| Monetization | — | Free with in-app purchases |
| Size | 11 MB | 30 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Fredrik Petersson](https://appshunter.io/developer/555276018) | [EclixTech UK LTD](https://appshunter.io/developer/1824450302) |

## What reviewers say

### ZappID

[App page](https://appshunter.io/ios/app/zappid/id1455029820)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 | $4.99 | 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 ZappID free?

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

### Is PDF Compressor－Compress PDF free?

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

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

PDF Compressor－Compress PDF shows ads; ZappID does not.

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

ZappID ships an update every 4 days, and PDF Compressor－Compress PDF every 2 months. Most recently, ZappID was updated on September 15, 2026 and PDF Compressor－Compress PDF on September 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.*