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 1376 topics
Announcing App Inventor Extension Components Hal Abelson 5/18/18
UPDATE! MIT App Inventor iOS version is coming ... Andrew McKinney 11/20/17
develop the server to create extensions Shivendra Kr. Sahu 5:06 PM
MIT App Inventor Tasks : Available for Testing Vincenzo 7:20 AM
help me please ..... ant authkey comand not found endi anak 6/21/18
MIT App Inventor Tasks : Available for Testing Justus 6/15/18
How can I compile MITAI2Companion.asc? Yong Tang 6/12/18
Is it possible to implement "onTaskRemoved" in an extension? Ken Nichols 6/12/18
To many redirects Hossein Amerkashi 6/12/18
Color Codes Hossein Amerkashi 6/9/18
Use latest Android build tools Pavitra 6/7/18
Request to modify the voice recognition function of the inventor app. ricardo soares Soares 6/7/18
UsesAssets annotation Hossein Amerkashi 6/5/18
UmbrellaException Sander Jochems 6/4/18
Using new annotations Tiziano1960 6/3/18
New feature for component annotations Evan Patton 5/31/18
Aplicación creada con appinventor , problemas David val.cesp. 5/31/18
Cannot convert Java type to Yail Sander Jochems 5/31/18
copy textbox to a different screen without opening the screen Lin Lin 5/30/18
Fast Fourier Transform progress Hakim Haris 5/26/18
Connect Lego ev3 with app from App Inventor Adam Kozłowski 5/25/18
Import extension failed when uploading: cannot find any clues why Jose Luu 5/24/18
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