# Pantheon Authenticator vs PDF Expert Viewer

The clearest difference is ads: Pantheon Authenticator at none against PDF Expert Viewer's shown. On price, update cadence, 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.

Pantheon Authenticator ships an update every 5 days, PDF Expert Viewer weekly. The most recent releases landed on October 12, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Pantheon Authenticator | PDF Expert Viewer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 5 days** | Weekly |
| Size | 17 MB | 64 MB |
| Requires iOS | **14.0** | 15 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 17+ |
| Developer | [Authnex](https://appshunter.io/developer/1512686868) | [Chengdu Doudou Oasis Network Technology Co.,Ltd](https://appshunter.io/developer/1776078126) |

## What reviewers say

### Pantheon Authenticator

[App page](https://appshunter.io/ios/app/pantheon-authenticator/id6478901175)

**In-app purchases:** none


### PDF Expert Viewer

[App page](https://appshunter.io/ios/app/pdf-expert-viewer/id6746780454)

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

**In-app purchases:** none


## Frequently asked questions

### Is Pantheon Authenticator free?

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

### Is PDF Expert Viewer free?

PDF Expert Viewer is free to download, with no in-app purchases.

### Do Pantheon Authenticator or PDF Expert Viewer have ads?

PDF Expert Viewer shows ads; Pantheon Authenticator does not.

### Which is updated more often, Pantheon Authenticator or PDF Expert Viewer?

Pantheon Authenticator ships an update every 5 days, and PDF Expert Viewer weekly. Most recently, Pantheon Authenticator was updated on October 12, 2026 and PDF Expert Viewer on October 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.*