# BookBub vs RADIX

The clearest difference is review sentiment: RADIX at 100% against BookBub's 54%. RADIX also leads on update cadence (every 3 days vs every 3 weeks) and rating (5.0 vs 4.7). BookBub's advantage is price (Free vs $4.99) and ratings volume (960 vs 2). On ads, in-app purchases and device support there is nothing between them.

BookBub 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 4.7. That said, the two scores are not equally well evidenced: BookBub has 960 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 54% of BookBub's written reviews are positive against 100% of RADIX's.

BookBub ships an update every 3 weeks, RADIX every 3 days. The most recent releases landed on October 17, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | BookBub | RADIX |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | [4.7 (960 ratings)](https://appshunter.io/ios/app/bookbub/id1030894438/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/radix-the-practice/id6756391736/reviews)** |
| Number of ratings | **960** | 2 |
| Positive reviews | 54.4% 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 |
| Best chart rank | **#62** | — |
| Size | 4 MB | 99 MB |
| Requires iOS | 26.0 | **15.1** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Pubmark Inc.](https://appshunter.io/developer/1030894437) | [Alexander Perrin](https://appshunter.io/developer/1860425795) |

## What reviewers say

### BookBub

[App page](https://appshunter.io/ios/app/bookbub/id1030894438)

**Currently charting:** #62 Top Free · Book (US App Store)

Discover daily deals on bestselling and free ebooks across all genres. Track your wishlist and receive price alerts for your favorite titles, ensuring you never miss a sale on books you want to read.

**Highlights:** Daily ebook deals, Hundreds of free ebooks, Personalized recommendations, Wishlist tracking, Price alerts, Genre and price filtering

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

**In-app purchases:** none

**What reviewers like**

- 🤩 Great deals on books
- 📚 Variety of genres and authors
- 💰 Affordable and free books
- 🔍 Personalized recommendations

**What reviewers complain about**

- 🔒 Limited to Apple Books only
- 🔍 Lack of search functionality
- 📝 Inability to leave reviews
- 🔁 Repeated email subscriptions

**Reported bugs**

- App crashes or freezes during use
- Sign-up and login issues
- Incompatibility with certain devices or operating systems

**Requested features**

- Add support for Kindle and other ebook platforms
- Implement search and filtering options
- Allow users to manage their reading lists and leave reviews
- Improve email subscription management


### 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 BookBub free?

BookBub 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, BookBub or RADIX?

RADIX is rated higher. BookBub averages 4.7 out of 5 from 960 ratings, while RADIX averages 5.0 from 2 ratings.

### Do BookBub or RADIX have ads?

Neither BookBub nor RADIX shows ads.

### Which is updated more often, BookBub or RADIX?

BookBub ships an update every 3 weeks, and RADIX every 3 days. Most recently, BookBub was updated on October 17, 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.*