# Lambertus+ vs MuBiBu

The clearest difference is update cadence: MuBiBu at monthly against Lambertus+'s every 5 months. MuBiBu also leads on review sentiment (20% vs 0%). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Lambertus+ ships an update every 5 months, MuBiBu monthly. The most recent releases landed on September 16, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Lambertus+ | MuBiBu |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/mubibu/id6740096016/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 0.0% of reviews | **20.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Monthly** |
| Monetization | Free | Free |
| Size | 18 MB | 48 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Lambertus-Verlag GmbH](https://appshunter.io/developer/873636927) | [Ueberreuter Verlag GmbH](https://appshunter.io/developer/1742020613) |

## What reviewers say

### Lambertus+

[App page](https://appshunter.io/ios/app/lambertus-plus/id873636924)

Access a digital library of specialized publications with advanced search and navigation. Annotate content with text, images, or audio. Organize your reading with bookmarks and a personal work desk for efficient research.

**Highlights:** Electronic table of contents, Fast and intelligent search, Work desk for full publication search, Add bookmarks, Personal annotations (text, image, audio), Attractive design

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

**In-app purchases:** none


### MuBiBu

[App page](https://appshunter.io/ios/app/mubibu/id6740096016)

This app unlocks audiobooks for children's music books, allowing them to listen to classical music and stories offline. Users can add books from their collection to a library and unlock content using an access question.

**Highlights:** Unlock audiobooks for physical music books, Listen online and offline, Add books to personal library, Discover new music and stories, Ad-free experience

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

**In-app purchases:** none


## Frequently asked questions

### Is Lambertus+ free?

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

### Is MuBiBu free?

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

### Do Lambertus+ or MuBiBu have ads?

Neither Lambertus+ nor MuBiBu shows ads.

### Which is updated more often, Lambertus+ or MuBiBu?

Lambertus+ ships an update every 5 months, and MuBiBu monthly. Most recently, Lambertus+ was updated on September 16, 2026 and MuBiBu on September 22, 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.*