# Thorium Reader vs FocusFlash

The clearest difference is update cadence: FocusFlash at every 4 days against Thorium Reader's every 3 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.

Thorium Reader ships an update every 3 weeks, FocusFlash every 4 days. The most recent releases landed on October 13, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Thorium Reader | FocusFlash |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.6 (11 ratings)](https://appshunter.io/ios/app/thorium-reader/id6745025189/reviews)** | — |
| Number of ratings | **11** | — |
| Positive reviews | 37.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 4 days** |
| Monetization | Free | — |
| Size | 46 MB | 4 MB |
| Requires iOS | 26.1 | **26.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Readium](https://appshunter.io/developer/1232183924) | [Andre Aigner](https://appshunter.io/developer/1766529838) |

## What reviewers say

### Thorium Reader

[App page](https://appshunter.io/ios/app/thorium-reader/id6745025189)

Organize all your ebooks, comics, and manga in a single app. Customize your reading experience with adjustable text, fonts, and themes. Listen to audiobooks and zoom into visual content with ease.

**Highlights:** Unified bookshelf for all content, Adjustable text size and spacing, Multiple font options, Text-to-speech audio playback, Zoom for comics and manga, Offline dictionary and translation, Import EPUB, PDF, CBZ files

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

**In-app purchases:** none


### FocusFlash

[App page](https://appshunter.io/ios/app/focusflash/id6759566954)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Thorium Reader free?

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

### Is FocusFlash free?

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

### Do Thorium Reader or FocusFlash have ads?

Neither Thorium Reader nor FocusFlash shows ads.

### Which is updated more often, Thorium Reader or FocusFlash?

Thorium Reader ships an update every 3 weeks, and FocusFlash every 4 days. Most recently, Thorium Reader was updated on October 13, 2026 and FocusFlash on October 4, 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.*