# Document Reader vs 19 Theory

The clearest difference is in-app purchases: 19 Theory at none against Document Reader's 2. 19 Theory also leads on ads (none vs shown) and update cadence (every 6 days vs every 10 months). Document Reader's advantage is iOS requirement (13.0 vs 15.6). On price and device support there is nothing between them.

Both are free to download. Document Reader sells 2 in-app purchases, starting at $2.99 per month. 19 Theory asks for nothing beyond the download.

Document Reader ships an update every 10 months, 19 Theory every 6 days. The most recent releases landed on October 6, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Document Reader | 19 Theory |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (6 ratings)](https://appshunter.io/ios/app/19-theory/id6502086077/reviews)** |
| Number of ratings | — | **6** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 10 months | **Every 6 days** |
| Monetization | — | Free |
| Size | 29 MB | 38 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Cyber Designz](https://appshunter.io/developer/517670966) | [Santosh B](https://appshunter.io/developer/1744386716) |

## What reviewers say

### Document Reader

[App page](https://appshunter.io/ios/app/document-reader-file-viewer/id1619051908)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade to Premium | $2.99 | per month |
| Upgrade to Premium | $24.99 | per year |


### 19 Theory

[App page](https://appshunter.io/ios/app/19-theory/id6502086077)

This platform helps organizations manage people, communication, and content. It centralizes updates, facilitates group management with role-based access, and allows for engagement through likes and comments. Secure and private, it aims to streamline internal communication and foster collaboration.

**Highlights:** Organized communication, Group management, Role-based access, Content management, Customizable notifications, Secure and private

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

**In-app purchases:** none


## Frequently asked questions

### Is Document Reader free?

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

### Is 19 Theory free?

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

### Do Document Reader or 19 Theory have ads?

Document Reader shows ads; 19 Theory does not.

### Which is updated more often, Document Reader or 19 Theory?

Document Reader ships an update every 10 months, and 19 Theory every 6 days. Most recently, Document Reader was updated on October 6, 2026 and 19 Theory on October 3, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*