# AEF ISOBUS DB vs Public Bookshelf

The clearest difference is price: AEF ISOBUS DB at Free against Public Bookshelf's $0.99. AEF ISOBUS DB also leads on iOS requirement (11.0 vs 18.0). Public Bookshelf's advantage is review sentiment (87% vs 50%) and update cadence (every 4 months vs every 10 months). On ads, in-app purchases and device support there is nothing between them.

AEF ISOBUS DB is free to download; Public Bookshelf costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

AEF ISOBUS DB ships an update every 10 months, Public Bookshelf every 4 months. Both last shipped on October 26, 2026.

## The numbers

| Metric | AEF ISOBUS DB | Public Bookshelf |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[1.0 (3 ratings)](https://appshunter.io/ios/app/aef-isobus-db/id1007540945/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 50.0% of reviews | **87.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 4 months** |
| Monetization | **Free** | Paid |
| Size | 7 MB | 6 MB |
| Requires iOS | **11.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Agricultural Industry Electronics Foundation e.V.](https://appshunter.io/developer/1007540734) | [Stefan Trauth](https://appshunter.io/developer/1073103749) |

## What reviewers say

### AEF ISOBUS DB

[App page](https://appshunter.io/ios/app/aef-isobus-db/id1007540945)

Access a comprehensive database of ISOBUS-certified agricultural machinery and devices. Easily check compatibility between tractors and implements, discover functionalities, and compare alternatives. Ensure your equipment works together seamlessly.

**Highlights:** ISOBUS database access, Tractor/implement compatibility checks, Functionality discovery, Alternative comparison, Certification status lookup, Share compatibility information

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

**In-app purchases:** none


### Public Bookshelf

[App page](https://appshunter.io/ios/app/public-bookshelf/id1243419632)

Discover free public libraries and book exchange spots in your area. Contribute to a growing database by adding, editing, or removing bookshelf locations and details like opening times and contact info.

**Highlights:** Find public bookshelves on a map, Add new bookshelf locations, Edit existing bookshelf information, View bookshelf opening times, Contribute to a community database

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is AEF ISOBUS DB free?

AEF ISOBUS DB is free to download, with no in-app purchases.

### Is Public Bookshelf free?

Public Bookshelf costs $0.99, with no in-app purchases.

### Do AEF ISOBUS DB or Public Bookshelf have ads?

Neither AEF ISOBUS DB nor Public Bookshelf shows ads.

### Which is updated more often, AEF ISOBUS DB or Public Bookshelf?

AEF ISOBUS DB ships an update every 10 months, and Public Bookshelf every 4 months. Most recently, AEF ISOBUS DB was updated on October 26, 2026 and Public Bookshelf on October 26, 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.*