# OPAC SBN vs BIBLIOLAZIO

The clearest difference is update cadence: OPAC SBN at every 9 days against BIBLIOLAZIO's every 6 months. OPAC SBN also leads on iOS requirement (8.0 vs 13.0). 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.

OPAC SBN ships an update every 9 days, BIBLIOLAZIO every 6 months. The most recent releases landed on August 23, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | OPAC SBN | BIBLIOLAZIO |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 36.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 6 months |
| Monetization | Free | — |
| Size | 7 MB | 29 MB |
| Requires iOS | **8.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Inera Srl](https://appshunter.io/developer/786155258) | [LAZIOcrea S.p.A.](https://appshunter.io/developer/1116992759) |

## 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


### BIBLIOLAZIO

[App page](https://appshunter.io/ios/app/bibliolazio/id1482751621)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is OPAC SBN free?

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

### Is BIBLIOLAZIO free?

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

### Do OPAC SBN or BIBLIOLAZIO have ads?

Neither OPAC SBN nor BIBLIOLAZIO shows ads.

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

OPAC SBN ships an update every 9 days, and BIBLIOLAZIO every 6 months. Most recently, OPAC SBN was updated on August 23, 2026 and BIBLIOLAZIO on September 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.*