# BUU vs ESAKids

The clearest difference is update cadence: BUU at every 2 months against ESAKids's every 56 months. ESAKids's advantage is iOS requirement (12.0 vs 15.0). 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.

BUU ships an update every 2 months, ESAKids every 56 months. The most recent releases landed on October 21, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | BUU | ESAKids |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (4 ratings)](https://appshunter.io/ios/app/esakids/id1527436992/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 75.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 56 months |
| Monetization | — | Free |
| Size | 743 MB | 1.4 GB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Yleisradio Oy](https://appshunter.io/developer/409333864) | [ESA - European Space Agency](https://appshunter.io/developer/429660009) |

## What reviewers say

### BUU

[App page](https://appshunter.io/ios/app/buu-klubben/id881422084)

**Features:** macOS Compatibility

**In-app purchases:** none


### ESAKids

[App page](https://appshunter.io/ios/app/esakids/id1527436992)

Engaging games designed to teach children about space exploration. Features activities like coloring, matching, and memory games for younger children, and more complex challenges like spacecraft building and space trivia for older kids. Explore the Solar System with Paxi.

**Highlights:** Space-themed educational games, Coloring, matching, and memory activities, Spacecraft building missions, Planet and moon landing challenges, Space debris cleanup, Space trivia for families

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is BUU free?

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

### Is ESAKids free?

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

### Do BUU or ESAKids have ads?

Neither BUU nor ESAKids shows ads.

### Which is updated more often, BUU or ESAKids?

BUU ships an update every 2 months, and ESAKids every 56 months. Most recently, BUU was updated on October 21, 2026 and ESAKids on October 25, 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.*