# BookScan vs AI4Watch

The clearest difference is iOS requirement: AI4Watch at 13.0 against BookScan's 15.1. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. BookScan sells 4 in-app purchases, starting at $4.99 per 7 days and AI4Watch sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on October 13, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | BookScan | AI4Watch |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | Monthly |
| Size | 92 MB | 5 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPod, Apple Watch |
| Age rating | 4+ | 12+ |
| Developer | [ISOMEM, Inc.](https://appshunter.io/developer/1677026791) | [Neobile LLC](https://appshunter.io/developer/1080490647) |

## What reviewers say

### BookScan

[App page](https://appshunter.io/ios/app/bookscan-digitize-and-ocr-docs/id6751296946)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Access | $4.99 | per 7 days |
| Unlimited Access | $4.99 | per 7 days |
| Unlimited Access | $29.99 | per year |
| Unlimited Access | $29.99 | per year |


### AI4Watch

[App page](https://appshunter.io/ios/app/ai4watch/id6758426630)

**Features:** Apple Watch app

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Membership Monthly | $1.99 | per month |
| Pro Membership Yearly (60% off) | $4.99 | per year |


## Frequently asked questions

### Is BookScan free?

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

### Is AI4Watch free?

AI4Watch is free to download, with in-app purchases available.

### Do BookScan or AI4Watch have ads?

Neither BookScan nor AI4Watch shows ads.

### Which is updated more often, BookScan or AI4Watch?

BookScan ships an update monthly, and AI4Watch monthly. Most recently, BookScan was updated on October 13, 2026 and AI4Watch on October 15, 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.*