# smART sketcher projector vs LEGO® Builder

The clearest difference is rating: LEGO® Builder at 4.8 against smART sketcher projector's 3.3. LEGO® Builder also leads on review sentiment (78% vs 36%) and in-app purchases (none vs 10). smART sketcher projector's advantage is iOS requirement (13.0 vs 15.1). On price, ads and device support there is nothing between them.

Both are free to download. smART sketcher projector sells 10 in-app purchases, starting at $1.99 per month. LEGO® Builder asks for nothing beyond the download.

LEGO® Builder holds the better App Store score, 4.8 against 3.3. That said, the two scores are not equally well evidenced: LEGO® Builder has 290K ratings behind it against 405, so its average is the more settled of the two. Written reviews point the same way: 36% of smART sketcher projector's written reviews are positive against 78% of LEGO® Builder's.

smART sketcher projector ships an update every 2 months, LEGO® Builder every 3 weeks. The most recent releases landed on October 23, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | smART sketcher projector | LEGO® Builder |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.3 (405 ratings)](https://appshunter.io/ios/app/smart-sketcher-projector/id1285747040/reviews) | **[4.8 (290K ratings)](https://appshunter.io/ios/app/lego-builder-3d-instructions/id1486159728/reviews)** |
| Number of ratings | 405 | **290K** |
| Positive reviews | 35.7% of reviews | **77.6% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Best chart rank | — | **#99** |
| Size | 36 MB | 264 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [FlyCatcher Inc.](https://appshunter.io/developer/841991396) | [LEGO](https://appshunter.io/developer/347363505) |

## What reviewers say

### smART sketcher projector

[App page](https://appshunter.io/ios/app/smart-sketcher-projector/id1285747040)

This app transforms a projector into a creative tool for sketching, drawing, and learning to write. It offers step-by-step guidance for users of all ages, allowing them to project personal photos or pre-loaded activities. Enhance your experience with exclusive content through a subscription.

**Highlights:** Project personal photos for drawing, Step-by-step drawing instructions, Learn to write letters and cursive, Pre-loaded activity packs, Filter images for different drawing mediums, Subscription for exclusive content

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Super smART! Basic | $1.99 | per month |
| Super smART! Premium | $6.99 | per month |
| Super smART! Premium | $29.99 | per year |
| Museum Art Collection | $14.99 | one-time |
| Horses and Unicorns | $14.99 | one-time |
| Royal Princesses #2 | $14.99 | one-time |
| Insect Kingdom | $14.99 | one-time |
| All Sports | $14.99 | one-time |
| Anime Chibi Characters | $14.99 | one-time |
| Historic Architecture | $14.99 | one-time |

**What reviewers like**

- 🎨 Helpful for improving drawing skills
- 📷 Ability to use own photos for tracing
- 🖌️ Step-by-step drawing instructions

**What reviewers complain about**

- 🔒 Subscription required for full functionality
- 🔍 Difficulty connecting to device
- 🔴 Buggy app crashes and freezes
- 🔍 Issues accessing photo library

**Reported bugs**

- SD card not recognized
- Bluetooth connection issues
- App crashes when trying to access camera

**Requested features**

- Resize and adjust image size options
- Ability to mute app sounds
- Support for multiple sketcher devices


### LEGO® Builder

[App page](https://appshunter.io/ios/app/lego-builder-3d-instructions/id1486159728)

**Currently charting:** #99 Top Free · Entertainment (US App Store)

This app provides interactive 3D building instructions for LEGO sets. It allows users to zoom, rotate, and view models from all angles, with step-by-step guidance. It also features a collaborative building mode for multiple users and a digital library of thousands of instruction manuals.

**Highlights:** Interactive 3D building instructions, Zoom, rotate, and view from all angles, Step-by-step digital guidance, Collaborative 'Build Together' mode, Digital library of thousands of instructions, Track building progress and brick count

**In-app purchases:** none

**What reviewers like**

- 🚀 Easy to use
- 👍 Helpful for building sets
- 🤖 Great 3D instructions
- 💡 Ability to save built sets
- 🎨 Organized by theme and year

**What reviewers complain about**

- 🐛 Crashes when using sticker steps
- 🔍 Missing instructions for older/retired sets
- 🔍 Incomplete set of instructions for newer sets
- 🔍 Difficult to navigate and find specific sets
- 🔍 Inability to add older sets to collection

**Reported bugs**

- Sets disappearing from collection after updates
- Inability to log in and save collection
- Slow loading and reloading of instructions
- Zoom and navigation issues on instructions

**Requested features**

- Add more older/retired sets
- Improve navigation and search functionality
- Allow adding of older sets to collection
- Implement wishlist feature
- Add more personalization options for profiles


## Frequently asked questions

### Is smART sketcher projector free?

smART sketcher projector is free to download, with in-app purchases available.

### Is LEGO® Builder free?

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

### Which has better reviews, smART sketcher projector or LEGO® Builder?

LEGO® Builder is rated higher. smART sketcher projector averages 3.3 out of 5 from 405 ratings, while LEGO® Builder averages 4.8 from 290K ratings.

### Do smART sketcher projector or LEGO® Builder have ads?

Neither smART sketcher projector nor LEGO® Builder shows ads.

### Which is updated more often, smART sketcher projector or LEGO® Builder?

smART sketcher projector ships an update every 2 months, and LEGO® Builder every 3 weeks. Most recently, smART sketcher projector was updated on October 23, 2026 and LEGO® Builder on November 1, 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.*