Robot Inventor Companion App


    • 4.5 • 25 Ratings
    • Free


Create intelligent remote-control robots and vehicles using interactive in-app building instructions, with the LEGO® MINDSTORMS® Robot Inventor App! For use with the LEGO MINDSTORMS Robot Inventor (51515) set, this companion app has everything you need to build Charlie, Tricky, Blast, M.V.P. and Gelo, each with their own unique abilities. Then get ready to code and play your way through 50+ challenging activities.

A fun build-and-play experience
As you construct each robotic toy using the step-by-step building instructions in the app, you’ll complete a series of fun coding activities along the way. But if you prefer, you can also download a PDF version.

Coding, the fun way
If you’ve ever used a visual coding environment, you’ll be right at home with the Robot Inventor App’s colourful drag-and-drop canvas based on Scratch. Each coding element is grouped into categories so you can quickly find what you’re looking for. As well as using the coding canvas to complete the 50+ activities included in the app, you can also code your own activities for an even greater challenge – or, if you’re a more advanced coder, you can also use Python.

Take control
The Robot Inventor App includes a remote-control feature so you can get your robot walking, dancing and firing with just a few taps! You can also customise it to create your own personalised controller.

Learn while you play
While you’re building, coding and playing with your robots, you’ll also be exploring, experimenting and learning.

Advanced machine learning
Using your device’s camera or microphone, you can train your models to recognise and react to objects and sounds… even your own voice!

A community of fan models
The Community section of the app lets you build and code a growing collection of fun models submitted by some of our fans.

Share your cool creation
If you’ve designed and built your own amazing robot, you can take a photo of it and upload it to LEGO Life for everyone to see. You can also get loads more inspiration from what others have created.

Key Features:
Intuitive drag-and-drop coding interface based on Scratch
50+ fun and challenging activities for beginners and more advanced users
Machine learning with advanced object and sound recognition
Community section with fan models and inspiration
Hub to hub connection for extended play possibilities
Help Centre with lots of tips for learning and exploring
Text-based Python coding for more advanced users
Bluetooth connectivity for wireless communication
Remote control for instant action
Consistent experience across iOS, macOS.
Digital building instructions included in the app
Kids gain STEM skills through playful learning

This is not a stand-alone app. It’s used to build and code interactive LEGO robot toys included with the LEGO MINDSTORMS Robot Inventor (51515) set.

To check whether your device is compatible with the Robot Inventor 51515 set and Robot Inventor App, visit

For more information about LEGO MINDSTORMS Robot Inventor, visit There’s also lots more for kids at

For app support, contact LEGO Consumer Service at

LEGO, the LEGO logo, the Minifigure, MINDSTORMS and the MINDSTORMS logo are trademarks and/or copyrights of the LEGO Group. ©2022 The LEGO Group. All rights reserved.

What’s New

Version 10.4.2

There's a new firmware available for your hub!

Ratings and Reviews

4.5 out of 5
25 Ratings

25 Ratings

MiloSimlo ,

Excellent but annoying

The app is truly fun most of the time but it can be a bit laggy and hard to connect to the hub and when a new update comes out you need to update the hub but other then that the app is excellent.

Developer Response ,

Thanks for taking the time to share your feedback! If you ever have any issues with our app, feel free to reach out to us at so we can take a closer look. 🙂☎️ We'll always do our best to make sure your app works perfectly! - Sonia, LEGO® Customer Service

badentkn ,

Great programming but one problem.

A couple months ago when I got this app it worked great and I had tons of fun with it. But I had to delete it because of storage issues but since I got it back when I try to connect to the hub with Bluetooth it wont take me to the pairing screen. I’m using a iPod for it so I don’t have a usb input I can use for it. So I don’t know if it’s just a bug or if it’s just my iPod but other than that it’s a great app and I’ve really enjoyed learning all the new bricks and things because I’m used to the EV3 robot. But all together it’s really great and I recommend it. But it doesn’t work than if you have a computer than use it for programming instead. I hope that this bug gets fixed soon but thanks for making all these cool things!!

Developer Response ,

That's strange! If you're having trouble connecting with Bluetooth, please check to see if your device is still compatible. You can also try forgetting or removing the hub from your device's Bluetooth Settings and trying the connection again. We're here at and we'd be happy to take a look with you! 📲😊 - John, LEGO® Customer Service

Bad Music H8tr ,


Ive always wanted ro be an engineer but im a kid so yeah.. But this app made me feel like one i built a robot named Robby he can shake your hand and hug :)
also two things i want to say is can you add cameras i want to just sit in my room and drivr a robot around without having to keep watch over it so it doesnt bump into stuff or fall over. also those who keep saying that their robot shuts off for no reason every 15 seconds and flashes orange, it means its on low power and you need to charge it. rip if you dont have the charger your screwed buddy

App Privacy

The developer, LEGO, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More

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