# JustPDF vs Red PDF Reader

The clearest difference is in-app purchases: Red PDF Reader at none against JustPDF's 1. Red PDF Reader also leads on update cadence (every 4 days vs weekly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. JustPDF sells 1 one-off in-app purchase. Red PDF Reader asks for nothing beyond the download.

JustPDF ships an update weekly, Red PDF Reader every 4 days. The most recent releases landed on September 13, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | JustPDF | Red PDF Reader |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Weekly | **Every 4 days** |
| Monetization | Free with in-app purchases | — |
| Size | 10 MB | 4 MB |
| Requires iOS | 18.6 | **18** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Johanna Hoppe](https://appshunter.io/developer/1869099620) | [Khurshed Gulov](https://appshunter.io/developer/1329538296) |

## What reviewers say

### JustPDF

[App page](https://appshunter.io/ios/app/justpdf-offline-pdf-reader/id6761554226)

A minimalist PDF reader for local document storage and offline viewing. Import PDFs from various sources into a private library designed for focus. Enjoy a clean, ad-free experience with a one-time purchase for unlimited access.

**Highlights:** Offline PDF reading, Private on-device storage, Clean PDF viewer, No ads, No account or cloud dependency, Fast access to library, One-time purchase

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| JustPDF Lifetime Unlock | $4.99 | one-time |


### Red PDF Reader

[App page](https://appshunter.io/ios/app/red-pdf-reader/id6763583714)

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

**In-app purchases:** none


## Frequently asked questions

### Is JustPDF free?

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

### Is Red PDF Reader free?

Red PDF Reader is free to download, with no in-app purchases.

### Do JustPDF or Red PDF Reader have ads?

Neither JustPDF nor Red PDF Reader shows ads.

### Which is updated more often, JustPDF or Red PDF Reader?

JustPDF ships an update weekly, and Red PDF Reader every 4 days. Most recently, JustPDF was updated on September 13, 2026 and Red PDF Reader on September 21, 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.*