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Download LEGO® Builder: 3D Instructions 4.2.1 APK
Version: 4.2.1 (5001095)
Languages: 24
Package: com.lego.legobuildinginstructions
Downloads: 107
Supports installation on external storage.
Target: Android 15 (API 35)
120, 160, 213, 240, 320, 480, 640dpi
What's new in LEGO® Builder: 3D Instructions 4.2.1
We've made the LEGO Building Instructions experience even more awesome. How? Well, we fixed some pesky bugs and improved performance in the app. Now you can build even bigger, better than before!
About LEGO® Builder: 3D Instructions 4.2.1
LEGO® Builder is the official LEGO® building instructions app that will guide you on an easy and collaborative building adventure.
Premium
Step into a new building experience
- LEGO Builder allows you to build with a fun, 3D modeling experience where you can zoom and rotate LEGO construction sets.
- Rotate individual bricks to find the color and shape you need, for each step of the LEGO building experience.
Build Together!
- Build Together is a fun and collaborative building experience that lets you tackle your LEGO instructions as a team, by delegating each builder their own creative tasks to complete!
- Share your PIN code and join as a host or builder. Take your turn, complete a building step with 3D modeling, then pass to the next person for collaborative building!
- Check if your set is supported in the app.
1000s of LEGO instructions supported
- Search and explore the full library of LEGO instructions for construction sets from 2000 to today. Start your digital collection today!
- You can also scan the QR code on the front cover of your paper LEGO instructions manual to open it directly in the app.
Follow a story as you build
- Discover enriched content for some of your favorite LEGO themes for an even better building experience.
Unlock the full experience with a LEGO account
- Build a digital collection of your LEGO construction sets and track how many bricks you’ve got in your collection!
- Save your building progress and pick up your LEGO instructions where you left off!
Things to keep in mind:
You will need a stable internet connection to use this app.
We’re always adding new LEGO building instructions to the experience, so you can grow and customize your digital collection and discover even more fun LEGO instructions!
Want to know if your set has 3D LEGO building instructions with the Build Together mode? Check in the app and enjoy collaborative building.
We're eager to hear how we can make the LEGO® Builder app even better for you! Please leave us your thoughts and recommendations in the reviews.
LEGO, the LEGO logo, the Brick and Knob configurations, and the Minifigure are trademarks of the LEGO Group. © 2025 The LEGO Group.
LEGO® Builder: 3D Instructions 4.2.1 variants
This release may come in several variants. Consult our handy FAQ to see which download is right for you.
LEGO® Builder: 3D Instructions 4.3.8 (arm64-v8a + arm-v7a) (120-640dpi) (Android 8.1+) BUNDLE 33 S
September 15, 2026Version:4.3.8(5100156) for Android 8.1+ (Oreo, API 27)
Uploaded:September 15, 2026 at 8:32AM UTC
File size:222.36 MB
Downloads:50
LEGO® Builder: 3D Instructions 4.3.7 (arm64-v8a + arm-v7a) (120-640dpi) (Android 8.1+) BUNDLE 31 S
August 24, 2026Version:4.3.7(5100151) for Android 8.1+ (Oreo, API 27)
Uploaded:August 24, 2026 at 7:56AM UTC
File size:211.88 MB
Downloads:132
LEGO® Builder: 3D Instructions 4.3.6 (arm64-v8a + arm-v7a) (120-640dpi) (Android 8.1+) BUNDLE 33 S
July 28, 2026Version:4.3.6(5100150) for Android 8.1+ (Oreo, API 27)
Uploaded:July 28, 2026 at 6:10AM UTC
File size:212.32 MB
Downloads:173
LEGO® Builder: 3D Instructions 4.3.5 (arm64-v8a + arm-v7a) (120-640dpi) (Android 8.1+) BUNDLE 19 S
July 14, 2026Version:4.3.5(5100148) for Android 8.1+ (Oreo, API 27)
Uploaded:July 14, 2026 at 8:00AM UTC
File size:200.79 MB
Downloads:96
LEGO® Builder: 3D Instructions 4.3.4 (arm64-v8a + arm-v7a) (120-640dpi) (Android 8.1+) BUNDLE 33 S
June 30, 2026Version:4.3.4(5100147) for Android 8.1+ (Oreo, API 27)
Uploaded:June 30, 2026 at 11:01AM UTC
File size:200.36 MB
Downloads:71
LEGO® Builder: 3D Instructions 4.3.3 (arm64-v8a + arm-v7a) (120-640dpi) (Android 8.1+) BUNDLE 33 S
May 27, 2026Version:4.3.3(5100143) for Android 8.1+ (Oreo, API 27)
Uploaded:May 27, 2026 at 9:35AM UTC
File size:191.19 MB
Downloads:209
LEGO® Builder: 3D Instructions 4.3.2 (arm64-v8a + arm-v7a) (120-640dpi) (Android 8.1+) BUNDLE 33 S
May 11, 2026Version:4.3.2(5100142) for Android 8.1+ (Oreo, API 27)
Uploaded:May 11, 2026 at 3:58PM UTC
File size:189.69 MB
Downloads:103
LEGO® Builder: 3D Instructions 4.3.0 (arm64-v8a + arm-v7a) (120-640dpi) (Android 8.1+) BUNDLE 8 S
March 27, 2026Version:4.3.0(5100139) for Android 8.1+ (Oreo, API 27)
Uploaded:March 27, 2026 at 9:35AM UTC
File size:176.90 MB
Downloads:127
LEGO® Builder: 3D Instructions 4.2.15 (arm64-v8a + arm-v7a) (120-640dpi) (Android 8.1+) BUNDLE 33 S
March 5, 2026Version:4.2.15(5100135) for Android 8.1+ (Oreo, API 27)
Uploaded:March 5, 2026 at 11:14AM UTC
File size:187.15 MB
Downloads:137
LEGO® Builder: 3D Instructions 4.2.14 (arm64-v8a + arm-v7a) (120-640dpi) (Android 8.1+) BUNDLE 33 S
February 10, 2026Version:4.2.14(5100131) for Android 8.1+ (Oreo, API 27)
Uploaded:February 10, 2026 at 2:47PM UTC
File size:187.60 MB
Downloads:197
Version:4.3.8
Uploaded:September 15, 2026 at 8:32AM UTC
File size:115.58 MB
Downloads:50
Version:4.3.7
Uploaded:August 24, 2026 at 7:56AM UTC
File size:111.99 MB
Downloads:132
Version:4.3.6
Uploaded:July 28, 2026 at 6:10AM UTC
File size:114.13 MB
Downloads:173
Version:4.3.5
Uploaded:July 14, 2026 at 8:00AM UTC
File size:113.33 MB
Downloads:96
Version:4.3.4
Uploaded:June 30, 2026 at 11:01AM UTC
File size:113.16 MB
Downloads:71
Version:4.3.3
Uploaded:May 27, 2026 at 9:35AM UTC
File size:109.88 MB
Downloads:209
Version:4.3.2
Uploaded:May 11, 2026 at 3:58PM UTC
File size:110.47 MB
Downloads:103
Version:4.3.1
Uploaded:April 17, 2026 at 2:05PM UTC
File size:104.79 MB
Downloads:137
Version:4.3.0
Uploaded:March 27, 2026 at 9:35AM UTC
File size:105.10 MB
Downloads:127
Version:4.2.15
Uploaded:March 5, 2026 at 11:14AM UTC
File size:114.84 MB
Downloads:137
