# Thorium Reader vs RADIX

The clearest difference is review sentiment: RADIX at 100% against Thorium Reader's 38%. RADIX also leads on rating (5.0 vs 3.6) and update cadence (every 3 days vs every 3 weeks). Thorium Reader's advantage is price (Free vs $4.99) and ratings volume (11 vs 2). On ads, in-app purchases and device support there is nothing between them.

Thorium Reader is free to download; RADIX costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

RADIX holds the better App Store score, 5.0 against 3.6. That said, the two scores are not equally well evidenced: Thorium Reader has 11 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 38% of Thorium Reader's written reviews are positive against 100% of RADIX's.

Thorium Reader ships an update every 3 weeks, RADIX every 3 days. The most recent releases landed on October 13, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Thorium Reader | RADIX |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | [3.6 (11 ratings)](https://appshunter.io/ios/app/thorium-reader/id6745025189/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/radix-the-practice/id6756391736/reviews)** |
| Number of ratings | **11** | 2 |
| Positive reviews | 37.5% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 3 days** |
| Monetization | **Free** | Paid |
| Size | 46 MB | 99 MB |
| Requires iOS | 26.1 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Readium](https://appshunter.io/developer/1232183924) | [Alexander Perrin](https://appshunter.io/developer/1860425795) |

## 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


### RADIX

[App page](https://appshunter.io/ios/app/radix-the-practice/id6756391736)

This app offers a contemplative system based on philosophical concepts, featuring original artworks and internal voices. It encourages users to observe their reactions and discover hidden elements over time, with a focus on slow unfolding rather than quick consumption.

**Highlights:** 54 original artworks, 6 internal voices, Seasonal structure, Hidden systems, Contemplative practice, No notifications or streaks

**In-app purchases:** none


## Frequently asked questions

### Is Thorium Reader free?

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

### Is RADIX free?

RADIX costs $4.99, with no in-app purchases.

### Which has better reviews, Thorium Reader or RADIX?

RADIX is rated higher. Thorium Reader averages 3.6 out of 5 from 11 ratings, while RADIX averages 5.0 from 2 ratings.

### Do Thorium Reader or RADIX have ads?

Neither Thorium Reader nor RADIX shows ads.

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

Thorium Reader ships an update every 3 weeks, and RADIX every 3 days. Most recently, Thorium Reader was updated on October 13, 2026 and RADIX on October 1, 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.*