# PDF Reader vs DocNinja

The clearest difference is update cadence: DocNinja at daily against PDF Reader's every 3 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. PDF Reader sells 3 in-app purchases, starting at $1.99 per 7 days and DocNinja sells 1 in-app purchase, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

PDF Reader ships an update every 3 weeks, DocNinja daily. The most recent releases landed on October 2, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | PDF Reader | DocNinja |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 3 weeks | **Daily** |
| Size | 48 MB | 49 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dimster Design LLC](https://appshunter.io/developer/1865684637) | [Furkan Konyali](https://appshunter.io/developer/1895734494) |

## What reviewers say

### PDF Reader

[App page](https://appshunter.io/ios/app/pdf-reader-scan-and-view/id6757312293)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Membership | $1.99 | per 7 days |
| Pro Membership | $2.99 | per month |
| Pro Membership | $29.99 | per year |


### DocNinja

[App page](https://appshunter.io/ios/app/docninja-pdf-toolkit/id6772437434)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DocNinja Pro Monthly | $2.99 | per month |


## Frequently asked questions

### Is PDF Reader free?

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

### Is DocNinja free?

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

### Do PDF Reader or DocNinja have ads?

Both PDF Reader and DocNinja show ads.

### Which is updated more often, PDF Reader or DocNinja?

PDF Reader ships an update every 3 weeks, and DocNinja daily. Most recently, PDF Reader was updated on October 2, 2026 and DocNinja on October 1, 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.*