# Comic Shelf vs Viewer DUO

The clearest difference is price: Comic Shelf at Free against Viewer DUO's $2.99. Comic Shelf also leads on update cadence (every 2 weeks vs every 6 weeks). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Comic Shelf is free to download; Viewer DUO costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Comic Shelf ships an update every 2 weeks, Viewer DUO every 6 weeks. The most recent releases landed on October 31, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Comic Shelf | Viewer DUO |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 6 weeks |
| Monetization | — | Paid |
| Size | 8 MB | 2 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [RYUZABU SAITO](https://appshunter.io/developer/6791222704) | [satoshi amasaki](https://appshunter.io/developer/1891268722) |

## What reviewers say

### Comic Shelf

[App page](https://appshunter.io/ios/app/comic-shelf/id6797688767)

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

**In-app purchases:** none


### Viewer DUO

[App page](https://appshunter.io/ios/app/viewer-duo/id6811308523)

Experience the tactile sensation of turning physical pages on your screen. This app simulates realistic page curls, shadows, and natural settling speeds for an immersive reading experience. It supports various formats and offers extensive customization for text and paper appearance.

**Highlights:** Realistic page-curl simulation, Two-page spread for landscape view, Supports PDF, EPUB, TXT, CBZ, CBR, Customizable text fonts and styles, Multiple paper and desk textures, Table of contents, bookmarks, search, Offline functionality

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

**In-app purchases:** none


## Frequently asked questions

### Is Comic Shelf free?

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

### Is Viewer DUO free?

Viewer DUO costs $2.99, with no in-app purchases.

### Do Comic Shelf or Viewer DUO have ads?

Neither Comic Shelf nor Viewer DUO shows ads.

### Which is updated more often, Comic Shelf or Viewer DUO?

Comic Shelf ships an update every 2 weeks, and Viewer DUO every 6 weeks. Most recently, Comic Shelf was updated on October 31, 2026 and Viewer DUO on November 6, 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.*