# COJI robot vs LEGO® Boost

The clearest difference is rating: LEGO® Boost at 4.6 against COJI robot's 4.1. LEGO® Boost also leads on review sentiment (66% vs 40%) and ratings volume (4.3K vs 103). COJI robot's advantage is update cadence (monthly vs every 3 months) and iOS requirement (9.0 vs 13.0). 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.

LEGO® Boost holds the better App Store score, 4.6 against 4.1. That said, the two scores are not equally well evidenced: LEGO® Boost has 4.3K ratings behind it against 103, so its average is the more settled of the two. Written reviews point the same way: 40% of COJI robot's written reviews are positive against 66% of LEGO® Boost's.

COJI robot ships an update monthly, LEGO® Boost every 3 months. Both last shipped on September 30, 2026.

## The numbers

| Metric | COJI robot | LEGO® Boost |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.1 (103 ratings)](https://appshunter.io/ios/app/coji-robot/id1116029369/reviews) | **[4.6 (4.3K ratings)](https://appshunter.io/ios/app/lego-boost/id1217385613/reviews)** |
| Number of ratings | 103 | **4.3K** |
| Positive reviews | 40.0% of reviews | **65.6% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 3 months |
| Monetization | Free | Free |
| Size | 139 MB | 717 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [WowWee Group Limited](https://appshunter.io/developer/417361068) | [LEGO](https://appshunter.io/developer/347363505) |

## What reviewers say

### COJI robot

[App page](https://appshunter.io/ios/app/coji-robot/id1116029369)

This app teaches children programming basics using emojis and interactive games. Kids can control a robot's actions, solve puzzles, and develop STEM skills through fun, engaging challenges.

**Highlights:** Emoji-based programming, Educational games, Robot control (movement, sounds, screen), STEM skill development, Problem-solving challenges, Memory games

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 🤩 Fun and engaging toy
- 👍 Easy to use
- 💡 Educational aspects
- 🤖 Cute robot design
- 🕹️ Retro games included

**What reviewers complain about**

- 🐛 App crashes frequently
- ❌ Connection issues
- 🔌 QR code issues
- 📱 Incompatible with older devices
- 🐌 Slow performance

**Reported bugs**

- Emojis not displaying correctly
- App crashes
- Robot not connecting via Bluetooth
- QR code link expired
- App freezes

**Requested features**

- More unlockable emojis
- Remote control support for RC mode
- More coding games
- Ability to disable certain games/features
- Camera in driving section


### LEGO® Boost

[App page](https://appshunter.io/ios/app/lego-boost/id1217385613)

Bring LEGO creations to life with this app! Use drag-and-drop coding to make models move, talk, and respond. Access building instructions and enjoy over 60 activities, or code your own unique models.

**Highlights:** Drag-and-drop coding interface, Digital LEGO building instructions, Over 60 fun activities, Codeable LEGO models, Control LEGO creations from mobile device, Combine with other LEGO sets

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Fun and engaging
- 👍 Great for learning coding
- 🎨 Excellent for creativity
- 💡 Impressive programming options
- 🤖 Enjoyable building experience

**What reviewers complain about**

- 🐛 Connectivity issues
- 🔋 Battery life problems
- 📚 Unclear instructions
- 🤔 Confusing programming interface
- 🔍 Difficulty finding parts

**Reported bugs**

- App crashes and freezes
- Firmware update failures
- Bluetooth connection problems
- Lost progress and build instructions
- Sensor and motor issues

**Requested features**

- More advanced programming blocks
- Ability to save and load projects
- Improved instructions and documentation
- Compatibility with more devices
- Easier part organization


## Frequently asked questions

### Is COJI robot free?

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

### Is LEGO® Boost free?

LEGO® Boost is free to download, with no in-app purchases.

### Which has better reviews, COJI robot or LEGO® Boost?

LEGO® Boost is rated higher. COJI robot averages 4.1 out of 5 from 103 ratings, while LEGO® Boost averages 4.6 from 4.3K ratings.

### Do COJI robot or LEGO® Boost have ads?

Neither COJI robot nor LEGO® Boost shows ads.

### Which is updated more often, COJI robot or LEGO® Boost?

COJI robot ships an update monthly, and LEGO® Boost every 3 months. Most recently, COJI robot was updated on September 30, 2026 and LEGO® Boost on September 30, 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.*