# Compress PDF vs Stamp Studio

The clearest difference is in-app purchases: Stamp Studio at none against Compress PDF's 3. Stamp Studio also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Compress PDF sells 3 in-app purchases, starting at $1.99 per 7 days. Stamp Studio asks for nothing beyond the download.

Compress PDF ships an update every 3 weeks, Stamp Studio monthly. The most recent releases landed on September 25, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Compress PDF | Stamp Studio |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/compress-pdf-image-compressor/id6757389445/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | Free with in-app purchases | — |
| Size | 14 MB | 4 MB |
| Requires iOS | 16.6 | **16.0** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ESPRESSO TECH (SMC-PRIVATE) LIMITED](https://appshunter.io/developer/1812366711) | [Beijing Yangming Jiuha Technology Co., Ltd](https://appshunter.io/developer/1600924656) |

## What reviewers say

### Compress PDF

[App page](https://appshunter.io/ios/app/compress-pdf-image-compressor/id6757389445)

Easily reduce the file size of PDFs and images without sacrificing quality. This utility helps you shrink large documents for sharing, uploading, or saving storage space on your device.

**Highlights:** Compress PDF files, Compress images, Custom compression levels, Fast PDF processing, Saved files manager, Download & share files

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Access | $1.99 | per 7 days |
| Monthly Access | $3.99 | per month |
| Yearly Access | $29.99 | per year |


### Stamp Studio

[App page](https://appshunter.io/ios/app/stamp-studio/id6790093959)

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

**In-app purchases:** none


## Frequently asked questions

### Is Compress PDF free?

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

### Is Stamp Studio free?

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

### Do Compress PDF or Stamp Studio have ads?

Compress PDF shows ads; Stamp Studio does not.

### Which is updated more often, Compress PDF or Stamp Studio?

Compress PDF ships an update every 3 weeks, and Stamp Studio monthly. Most recently, Compress PDF was updated on September 25, 2026 and Stamp Studio on October 12, 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.*