# EcO2 Treatment vs PDF Reader

The clearest difference is in-app purchases: EcO2 Treatment at none against PDF Reader's 3. EcO2 Treatment also leads on ads (none vs shown) and iOS requirement (12.0 vs 14.0). On price, update cadence and device support there is nothing between them.

Both are free to download. PDF Reader sells 3 in-app purchases, starting at $2.49 per 7 days. EcO2 Treatment asks for nothing beyond the download.

EcO2 Treatment ships an update every 2 months, PDF Reader every 4 months. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | EcO2 Treatment | PDF Reader |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.1 (53 ratings)](https://appshunter.io/ios/app/pdf-reader-pdf-viewer-edit/id6448322721/reviews)** |
| Number of ratings | — | **53** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 2 months** | Every 4 months |
| Monetization | — | Free with in-app purchases |
| Size | 41 MB | 16 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [PETERSON - ECO2 VIETNAM COMPANY LIMITED](https://appshunter.io/developer/1651178071) | [Mohit Rudani](https://appshunter.io/developer/1673702969) |

## What reviewers say

### EcO2 Treatment

[App page](https://appshunter.io/ios/app/eco2-treatment/id6443981795)

**Features:** macOS Compatibility

**In-app purchases:** none


### PDF Reader

[App page](https://appshunter.io/ios/app/pdf-reader-pdf-viewer-edit/id6448322721)

This application allows users to read, edit, and manage PDF files on their mobile devices. It offers offline viewing for PDFs, Word, Excel, and PowerPoint documents, along with features like bookmarking and file renaming. Enhance your productivity with this essential document management tool.

**Highlights:** View local PDF files, Load files from Files app, Save and rename PDF files, Share PDFs easily, Bookmark PDF pages, Offline document viewing, Dark Mode for reading

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly   1 Week | $2.49 | per 7 days |
| Monthly   1 Month | $5.99 | per month |
| Yearly   1 Year | $24.99 | per year |


## Frequently asked questions

### Is EcO2 Treatment free?

EcO2 Treatment is free to download, with no in-app purchases.

### Is PDF Reader free?

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

### Do EcO2 Treatment or PDF Reader have ads?

PDF Reader shows ads; EcO2 Treatment does not.

### Which is updated more often, EcO2 Treatment or PDF Reader?

EcO2 Treatment ships an update every 2 months, and PDF Reader every 4 months. Most recently, EcO2 Treatment was updated on October 27, 2026 and PDF Reader on October 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.*