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 1271 topics
Announcing App Inventor Extension Components Hal Abelson 12/30/17
UPDATE! MIT App Inventor iOS version is coming ... Andrew McKinney 11/20/17
arabic extensions Aissa Gassmi 2:18 AM
need help Aissa Gassmi 1:49 AM
App working fine when developing (using Companion) won't start when regularly installed Maurizio Romano 1/19/18
Error compiling APK with my extension 1/19/18
How to use 'Super Dev Mode' (GWT) with AI sources? Pavitra 1/18/18
Where can I get source code for nb165? 1/17/18
Testing Gradle Pavitra 1/16/18
Dynamic Components Holder Shivendra Kr. Sahu 1/15/18
gwt.css file Pavitra 1/14/18
List project of another user atab121 1/13/18
how can build apk using appinventor-sources ? Shivendra Kr. Sahu 1/12/18
Extensiones que Bloquean las app desde la ultima actualizacion David Valdivia 1/12/18
las app copiladas desde la ultima actualización se bloquean David Valdivia 1/12/18
Build.xml error when "ant extensions" 1/12/18
localhost unable to connect atab121 1/12/18
GWT lib Pavitra 1/12/18
New proposal mysql/phpmyadmin online database support 1/11/18
Issue report for Sharing component 1/11/18
NullPointerException with PlayApp Moliata 1/10/18
Activity starter for Android alarm Bobbyj 1/10/18
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