# Domyn vs Red PDF Reader

The clearest difference is update cadence: Red PDF Reader at every 4 days against Domyn's every 2 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Domyn ships an update every 2 weeks, Red PDF Reader every 4 days. The most recent releases landed on September 15, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Domyn | Red PDF Reader |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 4 days** |
| Size | 33 MB | 4 MB |
| Requires iOS | **17.0** | 18 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Crystal Apps Ltd.](https://appshunter.io/developer/1142260568) | [Khurshed Gulov](https://appshunter.io/developer/1329538296) |

## What reviewers say

### Domyn

[App page](https://appshunter.io/ios/app/domyn/id6756927384)

**Features:** Vision Pro support

**In-app purchases:** none


### 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 Domyn free?

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

### Is Red PDF Reader free?

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

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

Neither Domyn nor Red PDF Reader shows ads.

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

Domyn ships an update every 2 weeks, and Red PDF Reader every 4 days. Most recently, Domyn was updated on September 15, 2026 and Red PDF Reader on September 10, 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.*