LEGO® Builder

LEGO® Builder

4.60
3.7k+ Reviews
4.60
3.7k + Reviews
1
7%
2
3%
3
3%
4
8%
5
78%

User Reviews

Athenor
Athenor
April 6, 2023
I just discovered this app can track my collection. I added all the sets I could remember, and that were in the app. I hit 175 sets and over 110k bricks. I.. may have a problem. I can't wait for future updates to continue adding older set support! Only negatives are that it is not easy to bulk add things, or add multiple copies of a set. But that is minor compared to it's primary use.
Lucky Punk Productions - OneManBoxOffice
Lucky Punk Productions - OneManBoxOffice
March 26, 2023
This is a great app to use for both kids and adults who like to keep track of all the sets they have, and what I like most is how it counts up how many bricks and pieces you have altogether, regardless of set or theme. I have noticed that a lot of the older, retired sets are not all there yet, and some of the newer sets from this year are still not in the app's database (I assume it's a slow process). It would also be nice to include polybag sets as well to make the themes more complete.
Jake Gotcher
Jake Gotcher
June 30, 2024
The app is great. You can search sets and scroll through different lego themes to see every set and what year they came out. I wish there was a wishlist feature on the app and also a feature that said which sets were retired/retiring soon without having to click into each set. Once those features are added, this would be 5 stars. The app let's you keep track of all the sets you own, but there should be a symbol on the set while scrolling to let you know without having to click into the set.
Elena Canfield (Flower child)
Elena Canfield (Flower child)
March 13, 2025
Love the app keeps track of all my sets for me and sometimes I like the digital instructions better cuz you can change the angles and see exactly how they put the pieces. But the only thing is when I go to register my set I scan the qr code and I go to get my 20 insider points and it makes you do a math problem but sometimes I can't press any numbers to answer the question like if the question is 2+2=_ and I try to press 4 and it does nothing. I have to back out and try a few times.
B Lang
B Lang
December 29, 2023
Phenomenal! When I was a kid, we didn't have Lego building instructions on an app like this. They were only in paper booklets. This app is absolutely amazing! It gives very detailed step by step instructions on how to build a particular Lego set. Just enter the set number, and it pulls up the instructions. It let's you zoom in and out so you can see every little detail on complex builds like Technic supercars. It also let's you spin and rotate the model in every direction. Absolutely stellar!
Miguel Perez
Miguel Perez
December 29, 2024
Good building assistant, but, and there's always a but. Color saturation is bad. White or clear, I spent a good 20 mins looking for a 1x1 white block. When I was about to file a missing piece, I came across a clear 1x1 block. Same issues with black and charcoal (dark grey). It's not as bad as the white, clear, but needed to say again. Needless to say, it can't replace the books that come with it
Zac Bottle
Zac Bottle
September 3, 2025
This is a five star app for the latest sets, hands down. But I had to dock two stars because the presentation of older sets is very poor. I decided to build set 21024 (The Louvre from the Architecture Series), but instead of the 3D presentation, you get a low resolution scan of the instructions. Architecture series instructions have a lot of notes in a small font, and they are often unreadable in the app. Zoom in and the words are a pixelated mess.
Joshua Fasola
Joshua Fasola
June 14, 2025
Love the 3D instructions. Great way to get my daughter involved in complicated sets, she can move it around to see where pieces go (I can too!). Also love the cataloging of which sets we own, and we were able to find an old advent calendar and the instructions to reassemble the miniature sets! LEGO is fun for EVERYONE!
Joni Scally
Joni Scally
February 4, 2025
The app seems to be getting worse. Struggle to register sets as it keeps taking you around in circles, jumping from the app to the web, constant maths questions, then when you think it's worked, you go on the app and the set isn't there. Very slow to work. Just becoming very frustrating to use.
John Hart
John Hart
March 7, 2026
The reason why I gave this app such a lousy score was because I was effectively forced to use it by the Lego company because there are no pdf instructions currently available for their Kanto Gym Badge GWP set. For all Lego know, I could have; A). Purchased a set that had missing/damaged instructions. B). Dislike using a printed book and prefer a PDF from my computer. C). Not wish to obtain a GWP set locked behind a $650 set and order the parts myself. Either way, Lego did not make it easy for me
Lisa Willis
Lisa Willis
March 6, 2026
This app was great at keeping track of what sets i owned and what i was missing. I am not sure when in the last week it has been updated but it us now barely usable. The list of my sets where i could view by theme have been replaced by some tiled display with no search features to alter what i am seeing. It looks horrible and is now useless for what it was designed for. If i could give 0 stars i would. Please return the original layout.
Mencik26
Mencik26
February 28, 2026
Find it easier and faster to use the guide book then this app because i have to click "next" for everything, even the pieces that you need to be put together multiple times, every one has to have its animation and "next" click rather then "these few pieces, put them together and you need to do it 3 more time's". The 3D image is good for you to see if you missed something.
antranik hindoyan
antranik hindoyan
January 18, 2026
this is an awesome added feature, especially for harder sets for my kids. However, this platform should absolutely not replace the paper instructions. the classical paper version offers so much more spatial awareness development rather than it being flick of the finger away. the platform is great to keep older catalogs once they get ruined and maybe rebuild some older sets. please, Lego, never get rid of the paper version !!!!
Matthew Thorlakson
Matthew Thorlakson
March 6, 2026
App keeps crashing hard, every 15 minutes or so. Wouldn't be a huge deal if it only happened once in a while, but when building a Bricklink set, you must use online instructions. Very annoying process having to re-open the app each time.
Mary Beth Wickham
Mary Beth Wickham
January 4, 2026
This app makes it so easy to construct the builds. I especially love that I can rotate the build for a 360° view if I'm confused about where a piece needs to go. I can zoom in and pan to the left or right. I can't do that with a paper book. I can also determine the colors much better in the app versus the book. All around I prefer the app to the instruction booklets.
junkfood universe
junkfood universe
March 5, 2026
it's an awesome way to store your instructions and keep track of your Lego sets! but the new screen for viewing your sets is not my favorite I prefer the way it was where I can find my sets easily. but other than that I love it!
Kevin derKinderen
Kevin derKinderen
March 6, 2026
What an excellent app! It makes building the most difficult Lego kits a real pleasure. I especially like how I can rotate pieces and assemblies to identify the right part and get the right placement. This is a model for other apps to follow.
Nick Chong
Nick Chong
February 22, 2026
Mainly ok but the absolutely annoying part of this app is the account sign out. I can't remember how many times I've needed to go through the forget password process as I am constantly signed out by this app. Response to Jane from support: yes, the app is updated. If you check out other 3 or lower star reviews, it appears to be a similar frustration. Getting redirected from app to web and asked for identity again when trying to register the sets.
Polly Wayne
Polly Wayne
February 17, 2026
This app is great! It was my first time building a Lego set as an adult and I found the app incredibly helpful. I built a botanical set and I am about to build another flower set and I can't wait to get started! I am going to see if my son wants to download it on his iPad because he is super into Legos and he usually uses the booklets. #legomama
Delta XD
Delta XD
February 13, 2026
At this point, the state of this app is pathetic. I’m forced to track my LEGO collection in Excel because the app lacks basic features: tracking multiples of the same set, wishlists, sharing collections/wishlists with others, and marking sets as built. It also doesn't show ownership markers next to sets when searching. Most frustratingly, the database is incomplete; I can't find many sets, specifically GWPs or Legoland exclusives. For a company as big as LEGO, this is unacceptable.