# Compress PDF vs CharisPDF

The clearest difference is in-app purchases: CharisPDF at none against Compress PDF's 3. CharisPDF also leads on ads (none vs shown) and update cadence (every 2 days vs every 3 weeks). Compress PDF's advantage is iOS requirement (15.0 vs 17.0). On price and device support there is nothing between them.

Both are free to download. Compress PDF sells 3 in-app purchases, starting at $2.99 per 7 days. CharisPDF asks for nothing beyond the download.

Compress PDF ships an update every 3 weeks, CharisPDF every 2 days. The most recent releases landed on October 6, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Compress PDF | CharisPDF |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Every 2 days** |
| Size | 33 MB | 2 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Muhammad Awais Younas](https://appshunter.io/developer/1771187232) | [Cheng Guan Teo](https://appshunter.io/developer/6803359428) |

## What reviewers say

### Compress PDF

[App page](https://appshunter.io/ios/app/compress-pdf-pdf-compressor/id6790176607)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Week | $2.99 | per 7 days |
| Premium Month | $7.99 | per month |
| Premium Year | $49.99 | per year |


### CharisPDF

[App page](https://appshunter.io/ios/app/charispdf/id6803359246)

**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 CharisPDF free?

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

### Do Compress PDF or CharisPDF have ads?

Compress PDF shows ads; CharisPDF does not.

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

Compress PDF ships an update every 3 weeks, and CharisPDF every 2 days. Most recently, Compress PDF was updated on October 6, 2026 and CharisPDF on October 4, 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.*