# mozaik3D vs Open Roberta Mobile

The clearest difference is rating: mozaik3D at 4.2 against Open Roberta Mobile's 1.7. mozaik3D also leads on ratings volume (141 vs 3). Open Roberta Mobile's advantage is in-app purchases (none vs 2) and update cadence (every 2 days vs every 5 weeks). On price, ads and device support there is nothing between them.

Both are free to download. mozaik3D sells 2 one-off in-app purchases. Open Roberta Mobile asks for nothing beyond the download.

mozaik3D holds the better App Store score, 4.2 against 1.7. That said, the two scores are not equally well evidenced: mozaik3D has 141 ratings behind it against 3, so its average is the more settled of the two.

mozaik3D ships an update every 5 weeks, Open Roberta Mobile every 2 days. The most recent releases landed on October 15, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | mozaik3D | Open Roberta Mobile |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (141 ratings)](https://appshunter.io/ios/app/mozaik3d-explore-and-learn/id1064850237/reviews)** | [1.7 (3 ratings)](https://appshunter.io/ios/app/open-roberta-mobile/id1446855164/reviews) |
| Number of ratings | **141** | 3 |
| Positive reviews | 58.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 2 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 447 MB | 14 MB |
| Requires iOS | 15.0 | **9.3** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [MOZAIK Education Ltd.](https://appshunter.io/developer/1064850236) | [Fraunhofer](https://appshunter.io/developer/487639036) |

## What reviewers say

### mozaik3D

[App page](https://appshunter.io/ios/app/mozaik3d-explore-and-learn/id1064850237)

This app makes learning engaging with over 1300 interactive 3D scenes covering history, science, math, and more. It offers digital lessons, quizzes, and narration to enhance understanding. Explore worlds in walk or VR mode, and practice languages with multi-language support.

**Highlights:** 1300+ interactive 3D scenes, Digital lessons, images, videos, audio, Quizzes and activities, Narrations and animations, Walk mode & VR mode, Multi-language support

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Mozaik STUDENT - (1 Year) | $44.99 | one-time |
| Mozaik TEACHER - (1 Year) | $119.99 | one-time |

**What reviewers like**

- ✨ Excellent educational tool
- 💡 Innovative 3D scenes
- 📚 Wide range of subjects
- 👍 User-friendly for learning
- 🚀 Fast performance (when working)

**What reviewers complain about**

- 🐛 Frequent login issues
- 🐌 Slow loading times
- ❌ Content not loading
- 🚫 Registration problems
- 📉 Glitchy and buggy

**Reported bugs**

- Login fails, password incorrect
- Cannot register, country/data not accepted
- Account not working after registration
- Adrenaline (advanced) scene shows error
- Audio cuts off in Human body (male) scene

**Requested features**

- Update lymphatic system scene with 3D cross-sections
- Add 3D scene about domestic cat
- Add 3D scene about digestive system
- Add narration for better understanding
- More topics for small kids (plants, flowers, animals)


### Open Roberta Mobile

[App page](https://appshunter.io/ios/app/open-roberta-mobile/id1446855164)

Visually program robots and microcontrollers using a drag-and-drop interface. Wirelessly transfer your creations to compatible hardware like LEGO Education WeDo 2.0 via Bluetooth. Explore a gallery of shared programs and access live coding help.

**Highlights:** Visual programming language (NEPO®), Robot and microcontroller control, Wireless Bluetooth transfer, Program sharing gallery, Live coding help, Multi-language support

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is mozaik3D free?

mozaik3D is free to download, with in-app purchases available.

### Is Open Roberta Mobile free?

Open Roberta Mobile is free to download, with no in-app purchases.

### Which has better reviews, mozaik3D or Open Roberta Mobile?

mozaik3D is rated higher. mozaik3D averages 4.2 out of 5 from 141 ratings, while Open Roberta Mobile averages 1.7 from 3 ratings.

### Do mozaik3D or Open Roberta Mobile have ads?

Neither mozaik3D nor Open Roberta Mobile shows ads.

### Which is updated more often, mozaik3D or Open Roberta Mobile?

mozaik3D ships an update every 5 weeks, and Open Roberta Mobile every 2 days. Most recently, mozaik3D was updated on October 15, 2026 and Open Roberta Mobile on October 10, 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.*