# AA Big Book e vs ZenKoan

The clearest difference is iOS requirement: AA Big Book e at 15.0 against ZenKoan's 18.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. AA Big Book e sells 3 in-app purchases, starting at $4.99 per month and ZenKoan sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | AA Big Book e | ZenKoan |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (20 ratings)](https://appshunter.io/ios/app/aa-big-book-e-reader-plus-audio/id6448790511/reviews)** | — |
| Number of ratings | **20** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Weekly | — |
| Monetization | Free with in-app purchases | — |
| Size | 33 MB | 3 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Tushar Bhagat](https://appshunter.io/developer/901932809) | [Mitaanshu Agarwal](https://appshunter.io/developer/1896724075) |

## What reviewers say

### AA Big Book e

[App page](https://appshunter.io/ios/app/aa-big-book-e-reader-plus-audio/id6448790511)

This app provides a digital version of the AA Big Book, allowing users to read, listen to the audio version, and take notes. It features highlighting, bookmarking, search functionality, and a sobriety calculator to support recovery.

**Highlights:** Highlight and color-code text, Take notes and reflections, Bookmark and quick access, Powerful search functionality, Full text of the Big Book, Audio playback, Sobriety calculator

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $4.99 | per month |
| Quarterly Subscription | $9.99 | per 3 months |
| Annual Subscription | $29.99 | per year |


### ZenKoan

[App page](https://appshunter.io/ios/app/zenkoan/id6773098526)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ZenKoan Pro Monthly | $9.99 | per month |
| ZenKoan Pro Yearly | $59.99 | per year |


## Frequently asked questions

### Is AA Big Book e free?

AA Big Book e is free to download, with in-app purchases available.

### Is ZenKoan free?

ZenKoan is free to download, with in-app purchases available.

### Do AA Big Book e or ZenKoan have ads?

Neither AA Big Book e nor ZenKoan shows ads.

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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.*