# BOOKSCAN Checker vs ZennWidget

The clearest difference is update cadence: ZennWidget at daily against BOOKSCAN Checker's every 3 months. BOOKSCAN Checker's advantage is iOS requirement (9.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

BOOKSCAN Checker ships an update every 3 months, ZennWidget daily. The most recent releases landed on September 19, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | BOOKSCAN Checker | ZennWidget |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 9.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Daily** |
| Monetization | Free | — |
| Size | 6 MB | 36 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [BOOKSCAN Inc.](https://appshunter.io/developer/441217651) | [taishin miyamoto](https://appshunter.io/developer/1570395608) |

## What reviewers say

### BOOKSCAN Checker

[App page](https://appshunter.io/ios/app/bookscan-checker/id461348808)

Scan book ISBN barcodes with your iPhone or iPod Touch camera to retrieve book and publisher information. It's designed for books that are out of copyright, public domain, or for which you have obtained permission to use.

**Highlights:** Scan ISBN barcodes using device camera, Display book information, Display publisher information, Supports iPhone, iPad, and iPod Touch, Free to download and use

**In-app purchases:** none


### ZennWidget

[App page](https://appshunter.io/ios/app/zennwidget/id6448756495)

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

**In-app purchases:** none


## Frequently asked questions

### Is BOOKSCAN Checker free?

BOOKSCAN Checker is free to download, with no in-app purchases.

### Is ZennWidget free?

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

### Do BOOKSCAN Checker or ZennWidget have ads?

Neither BOOKSCAN Checker nor ZennWidget shows ads.

### Which is updated more often, BOOKSCAN Checker or ZennWidget?

BOOKSCAN Checker ships an update every 3 months, and ZennWidget daily. Most recently, BOOKSCAN Checker was updated on September 19, 2026 and ZennWidget 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.*