# OPAC SBN vs BiblioSar

The clearest difference is update cadence: OPAC SBN at every 9 days against BiblioSar's every 2 months. OPAC SBN also leads on iOS requirement (8.0 vs 15.0). On price, review sentiment, ads and in-app purchases there is nothing between them.

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

OPAC SBN ships an update every 9 days, BiblioSar every 2 months. The most recent releases landed on August 23, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | OPAC SBN | BiblioSar |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **36.1% of reviews** | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 2 months |
| Monetization | Free | Free |
| Size | 7 MB | 82 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Inera Srl](https://appshunter.io/developer/786155258) | [DOT BEYOND SRL](https://appshunter.io/developer/1384557126) |

## What reviewers say

### OPAC SBN

[App page](https://appshunter.io/ios/app/opac-sbn/id786155255)

Access the National Library Service catalog to find books, music, and more. Search by various criteria, view document details, and locate owning libraries. Save favorites and share information.

**Highlights:** Search catalog by various criteria, Locate owning libraries, View document details and covers, Save favorites (documents, authors, searches), Share bibliographic information, Map view of libraries, Voice search

**In-app purchases:** none


### BiblioSar

[App page](https://appshunter.io/ios/app/bibliosar/id1068876753)

Access and search the catalog of libraries in the Autonomous Region of Sardinia. Find, reserve, and manage loans for books, e-books, and audiobooks. Features a digital library card and multi-account access for shared use.

**Highlights:** Search library catalogs, Reserve books, Access digital materials (e-books, audiobooks), Manage loans and renewals, Digital library card, Multi-account access

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is OPAC SBN free?

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

### Is BiblioSar free?

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

### Do OPAC SBN or BiblioSar have ads?

Neither OPAC SBN nor BiblioSar shows ads.

### Which is updated more often, OPAC SBN or BiblioSar?

OPAC SBN ships an update every 9 days, and BiblioSar every 2 months. Most recently, OPAC SBN was updated on August 23, 2026 and BiblioSar on September 20, 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.*