# TRWViewer vs CypherGuard EPUB

The clearest difference is update cadence: TRWViewer at every 3 weeks against CypherGuard EPUB's every 6 months. TRWViewer also leads on iOS requirement (12.2 vs 15.0). 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.

TRWViewer ships an update every 3 weeks, CypherGuard EPUB every 6 months. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | TRWViewer | CypherGuard EPUB |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 6 months |
| Monetization | — | Free |
| Size | 14 MB | 55 MB |
| Requires iOS | **12.2** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [東邦電子株式会社](https://appshunter.io/developer/1401890483) | [CypherTec Inc.](https://appshunter.io/developer/507907491) |

## What reviewers say

### TRWViewer

[App page](https://appshunter.io/ios/app/trwviewer/id1401890484)

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

**In-app purchases:** none


### CypherGuard EPUB

[App page](https://appshunter.io/ios/app/cypherguard-epub/id1556179410)

This app allows you to view EPUB files, including those protected by encryption. You can read standard EPUBs and encrypted .cgepub files if licensed for viewing on your device.

**Highlights:** View standard EPUB files, Read encrypted .cgepub files, License-based content access, Supports iPhone and iPad

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is TRWViewer free?

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

### Is CypherGuard EPUB free?

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

### Do TRWViewer or CypherGuard EPUB have ads?

Neither TRWViewer nor CypherGuard EPUB shows ads.

### Which is updated more often, TRWViewer or CypherGuard EPUB?

TRWViewer ships an update every 3 weeks, and CypherGuard EPUB every 6 months. Most recently, TRWViewer was updated on October 26, 2026 and CypherGuard EPUB on October 24, 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.*