# BOOKSCAN Checker vs Messay2

The clearest difference is in-app purchases: BOOKSCAN Checker at none against Messay2's 2. BOOKSCAN Checker also leads on iOS requirement (9.0 vs 15.0). Messay2's advantage is update cadence (every 6 days vs every 3 months). On price, ads and device support there is nothing between them.

Both are free to download. Messay2 sells 2 in-app purchases, starting at $12.99 per month. BOOKSCAN Checker asks for nothing beyond the download.

BOOKSCAN Checker ships an update every 3 months, Messay2 every 6 days. The most recent releases landed on September 19, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | BOOKSCAN Checker | Messay2 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 9.1% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 6 days** |
| Monetization | Free | — |
| Size | 6 MB | 162 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [BOOKSCAN Inc.](https://appshunter.io/developer/441217651) | [NDK dev](https://appshunter.io/developer/1585732515) |

## 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


### Messay2

[App page](https://appshunter.io/ios/app/messay2/id6760009259)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $12.99 | per month |
| Premium | $129.00 | per year |


## Frequently asked questions

### Is BOOKSCAN Checker free?

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

### Is Messay2 free?

Messay2 is free to download, with in-app purchases available.

### Do BOOKSCAN Checker or Messay2 have ads?

Neither BOOKSCAN Checker nor Messay2 shows ads.

### Which is updated more often, BOOKSCAN Checker or Messay2?

BOOKSCAN Checker ships an update every 3 months, and Messay2 every 6 days. Most recently, BOOKSCAN Checker was updated on September 19, 2026 and Messay2 on September 10, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*