# KVV.kids vs MuBiBu

The clearest difference is review sentiment: KVV.kids at 100% against MuBiBu's 14%. KVV.kids also leads on iOS requirement (14.0 vs 16.0). On price, update cadence, 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.

KVV.kids ships an update monthly, MuBiBu every 3 weeks. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | KVV.kids | MuBiBu |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/mubibu/id6740096016/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | **100.0% of reviews** | 14.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 35 MB | 86 MB |
| Requires iOS | **14.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Karlsruher Verkehrsverbund GmbH (KVV)](https://appshunter.io/developer/1473242505) | [Ueberreuter Verlag GmbH](https://appshunter.io/developer/1742020613) |

## What reviewers say

### KVV.kids

[App page](https://appshunter.io/ios/app/kvvkids/id1533089287)

This app offers an interactive story about a tram named Pauly and his adventures. It educates children on proper behavior in trams and safe movement in traffic. Parents can also use it for reading aloud.

**Highlights:** Interactive tram adventures, Public transport safety education, Adjustable reading speed, Adjustable font size, Storytelling for parents and children

**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 KVV.kids free?

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

### Is MuBiBu free?

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

### Do KVV.kids or MuBiBu have ads?

Neither KVV.kids nor MuBiBu shows ads.

### Which is updated more often, KVV.kids or MuBiBu?

KVV.kids ships an update monthly, and MuBiBu every 3 weeks. Most recently, KVV.kids was updated on November 3, 2026 and MuBiBu on November 4, 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.*