# RoboFellow vs Merge Explorer

The clearest difference is rating: Merge Explorer at 4.1 against RoboFellow's 3.0. Merge Explorer also leads on ratings volume (279 vs 4). RoboFellow's advantage is in-app purchases (none vs 4) and update cadence (every 3 days vs monthly). On price, ads and device support there is nothing between them.

Both are free to download. Merge Explorer sells 4 in-app purchases, starting at $9.99 per month. RoboFellow asks for nothing beyond the download.

Merge Explorer holds the better App Store score, 4.1 against 3.0. That said, the two scores are not equally well evidenced: Merge Explorer has 279 ratings behind it against 4, so its average is the more settled of the two.

RoboFellow ships an update every 3 days, Merge Explorer monthly. The most recent releases landed on October 21, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | RoboFellow | Merge Explorer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (4 ratings)](https://appshunter.io/ios/app/robofellow/id1248744200/reviews) | **[4.1 (279 ratings)](https://appshunter.io/ios/app/merge-explorer/id1453098606/reviews)** |
| Number of ratings | 4 | **279** |
| Positive reviews | — | 46.2% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Monthly |
| Monetization | **Free** | Free with in-app purchases |
| Size | 60 MB | 1.3 GB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [RoboGarden Inc.](https://appshunter.io/developer/1248744199) | [Merge Apps](https://appshunter.io/developer/1253049593) |

## What reviewers say

### RoboFellow

[App page](https://appshunter.io/ios/app/robofellow/id1248744200)

This app allows users to control LEGO MINDSTORMS robots using a drag-and-drop block coding interface. It is designed for children aged 10 and above to engage with robotics and programming concepts.

**Highlights:** Control LEGO MINDSTORMS robots, Drag-and-drop block coding, Educational engagement for children, Robotics programming, Targeted for ages 10+

**Features:** macOS Compatibility

**In-app purchases:** none


### Merge Explorer

[App page](https://appshunter.io/ios/app/merge-explorer/id1453098606)

Explore over 100 interactive science simulations using a smartphone and a Merge Cube. Investigate volcanoes, sharks, the solar system, and more with hands-on activities and quizzes. Ideal for K-8 students learning science at school or home.

**Highlights:** Over 100 science simulations, Interactive Merge Cube experiences, Hands-on learning activities, Built-in quizzes, NGSS-aligned K-8 curriculum, Physical, Life, and Earth/Space Science topics

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Merge EDU Individual | $9.99 | per month |
| Explorer Premium Monthly | $9.99 | per month |
| Merge EDU Individual | $99.99 | per year |
| Explorer Premium Annual | $99.99 | per year |

**What reviewers like**

- 👍 Easy for young students
- 💡 Flexible for lesson needs
- 🔬 Used for research and experiments
- 💡 Introduces new content exploratorily
- 🤩 Engaging and versatile for learning

**What reviewers complain about**

- 💰 Expensive purchase
- 💰 Forced subscription for software
- 💰 Cannot view software before paying
- 💰 Money trap
- 💰 Only for rich people

**Reported bugs**

- App crashes on iPad
- App crashes when pressing play
- Camera not working in app
- Black screen when using cube or camera
- VR function broken

**Requested features**

- Make the app free to play
- Add more fun things, not just learning
- Bring back the fun apps (time bomb, block courses)
- Allow users to create their own games for the merge cube
- Add a way to reset quizzes for class sets of devices


## Frequently asked questions

### Is RoboFellow free?

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

### Is Merge Explorer free?

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

### Which has better reviews, RoboFellow or Merge Explorer?

Merge Explorer is rated higher. RoboFellow averages 3.0 out of 5 from 4 ratings, while Merge Explorer averages 4.1 from 279 ratings.

### Do RoboFellow or Merge Explorer have ads?

Neither RoboFellow nor Merge Explorer shows ads.

### Which is updated more often, RoboFellow or Merge Explorer?

RoboFellow ships an update every 3 days, and Merge Explorer monthly. Most recently, RoboFellow was updated on October 21, 2026 and Merge Explorer on October 23, 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.*