# LEGO® Boost vs HAPPY BUILD

The clearest difference is review sentiment: LEGO® Boost at 66% against HAPPY BUILD's 17%. LEGO® Boost also leads on rating (4.6 vs 3.0) and ratings volume (4.3K vs 7). HAPPY BUILD's advantage is update cadence (every 4 weeks 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 3.0. That said, the two scores are not equally well evidenced: LEGO® Boost has 4.3K ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 66% of LEGO® Boost's written reviews are positive against 17% of HAPPY BUILD's.

LEGO® Boost ships an update every 3 months, HAPPY BUILD every 4 weeks. The most recent releases landed on October 24, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | LEGO® Boost | HAPPY BUILD |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (4.3K ratings)](https://appshunter.io/ios/app/lego-boost/id1217385613/reviews)** | [3.0 (7 ratings)](https://appshunter.io/ios/app/happy-build/id1478354576/reviews) |
| Number of ratings | **4.3K** | 7 |
| Positive reviews | **65.6% of reviews** | 16.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 4 weeks** |
| Monetization | Free | Free |
| Size | 717 MB | 375 MB |
| Requires iOS | 13.0 | **9.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [LEGO](https://appshunter.io/developer/347363505) | [睦彬 王](https://appshunter.io/developer/1259740025) |

## What reviewers say

### 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


### HAPPY BUILD

[App page](https://appshunter.io/ios/app/happy-build/id1478354576)

Control Xinyu Bluetooth toy cars with your mobile device. Offers multiple control methods like buttons, gyroscope, voice commands, and programming for varied play experiences.

**Highlights:** Bluetooth connectivity, Multiple control modes, Gyroscope control, Voice command control, Action programming

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

**In-app purchases:** none


## Frequently asked questions

### Is LEGO® Boost free?

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

### Is HAPPY BUILD free?

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

### Which has better reviews, LEGO® Boost or HAPPY BUILD?

LEGO® Boost is rated higher. LEGO® Boost averages 4.6 out of 5 from 4.3K ratings, while HAPPY BUILD averages 3.0 from 7 ratings.

### Do LEGO® Boost or HAPPY BUILD have ads?

Neither LEGO® Boost nor HAPPY BUILD shows ads.

### Which is updated more often, LEGO® Boost or HAPPY BUILD?

LEGO® Boost ships an update every 3 months, and HAPPY BUILD every 4 weeks. Most recently, LEGO® Boost was updated on October 24, 2026 and HAPPY BUILD on October 17, 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.*