App Inventor Open Source Development

The MIT Center for Mobile Learning is pleased to announce the official free and open-source release of the MIT App Inventor source code at

Our hope is to nurture a robust and active open-source community, now that we have deployed MIT’s large-scale public App Inventor service. We will be updating this site with each new release of MIT App Inventor. We have also posted supporting documentation and will continue to add more as it evolves.  

In addition we have created a forum for the App Inventor open-source developer community. The forum will be managed by MIT App Inventor Development Team Member José Flores. José is enthusiastic about helping this community realize its potential to become the source of creativity that will evolve and extend App Inventor and open the power of mobile apps development to learners and aspiring developers of all ages. We look forward to all of your feedback and questions as we move forward in the development of App Inventor.

Enjoy the code, and Happy Inventing!

Andrew McKinney
MIT Appinventor Technical Lead

Showing 1-22 of 1341 topics
Announcing App Inventor Extension Components Hal Abelson 12/30/17
UPDATE! MIT App Inventor iOS version is coming ... Andrew McKinney 11/20/17
create new componet josehalo 4/20/18
How to update control blocks code? Sander Jochems 4/17/18
Uploaded application size has exceeded the limit: 1074377551 > 1073741824 Arda Çebi 4/16/18
Procedure for Creating new Component Methos Shas 4/11/18
please help me understanding this line Shivendra Kr. Sahu 4/11/18
MIT App Inventor Tasks : Available for Testing Justus 4/10/18
Error While using libraries for extension! Ashutosh Sharma 4/10/18
DataBase Girik Jindal 4/10/18
Does the action bar do something? 4/9/18
Login issue while trying to add new components Methos Shas 4/7/18
How to import libraries? Ashutosh Sharma 4/7/18
how to add visible component by extension? Ashutosh Sharma 4/6/18
Download the source code yly yly 4/5/18
Making the Splash Screen launch at builder launch Arda Çebi 4/5/18
Implementing an HTML and CSS designed splash screen to the builder Arda Çebi 4/5/18 Ken Nichols 4/5/18
Can the Component be converted to View? Ashutosh Sharma 4/5/18
error: * is not supported in -source 1.5 Ken Nichols 4/3/18
Click Event extension for any components Ashutosh Sharma 4/3/18
Build Custom AI from config file Methos Shas 4/3/18
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