# ADI BOOK vs BrainFit

The clearest difference is in-app purchases: ADI BOOK at none against BrainFit's 2. ADI BOOK also leads on ads (none vs shown). BrainFit's advantage is update cadence (every 4 days vs fortnightly). On price, device support and iOS requirement there is nothing between them.

Both are free to download. BrainFit sells 2 in-app purchases, starting at $7.99 per month. ADI BOOK asks for nothing beyond the download.

ADI BOOK ships an update fortnightly, BrainFit every 4 days. The most recent releases landed on September 17, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | ADI BOOK | BrainFit |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Fortnightly | **Every 4 days** |
| Size | 61 MB | 65 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 12+ |
| Developer | [ADI BOOK LIMITED](https://appshunter.io/developer/1801016102) | [GIL YOUNG SONG](https://appshunter.io/developer/1886619677) |

## What reviewers say

### ADI BOOK

[App page](https://appshunter.io/ios/app/adi-book-instructor/id6743073433)

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

**In-app purchases:** none


### BrainFit

[App page](https://appshunter.io/ios/app/brainfit-brain-training/id6760884591)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| BrainFit Pro Monthly | $7.99 | per month |
| BrainFit Pro Annual | $59.99 | per year |


## Frequently asked questions

### Is ADI BOOK free?

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

### Is BrainFit free?

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

### Do ADI BOOK or BrainFit have ads?

BrainFit shows ads; ADI BOOK does not.

### Which is updated more often, ADI BOOK or BrainFit?

ADI BOOK ships an update fortnightly, and BrainFit every 4 days. Most recently, ADI BOOK was updated on September 17, 2026 and BrainFit on September 10, 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.*