# ISBN vs Sergic

The clearest difference is price: Sergic at Free against ISBN's $0.99. Sergic also leads on update cadence (monthly vs every 8 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Sergic is free to download; ISBN costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ISBN ships an update every 8 months, Sergic monthly. The most recent releases landed on October 24, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | ISBN | Sergic |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Monthly** |
| Monetization | Paid | — |
| Size | 3 MB | 6 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [CROMBEZ Emmanuel](https://appshunter.io/developer/375656695) | [Sergic](https://appshunter.io/developer/1121168367) |

## What reviewers say

### ISBN

[App page](https://appshunter.io/ios/app/isbn/id1061626540)

Create and manage a personal book inventory using ISBN codes. Organize books with custom flags, notes, and contact associations. Export your library data to CSV for use in spreadsheets.

**Highlights:** Book inventory management, ISBN scanning/entry, Customizable flags for categorization, Free text notes per book, Attach books to contacts, CSV export for spreadsheets

**In-app purchases:** none


### Sergic

[App page](https://appshunter.io/ios/app/sergic/id6756122069)

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

**In-app purchases:** none


## Frequently asked questions

### Is ISBN free?

ISBN costs $0.99, with no in-app purchases.

### Is Sergic free?

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

### Do ISBN or Sergic have ads?

Neither ISBN nor Sergic shows ads.

### Which is updated more often, ISBN or Sergic?

ISBN ships an update every 8 months, and Sergic monthly. Most recently, ISBN was updated on October 24, 2026 and Sergic on October 14, 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.*