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 1-21 of 1051 topics
Announcing App Inventor Extension Components Hal Abelson 2/26/17
Can't compile app inventor source using ant Marzooq Moosa 8:58 AM
Questions about a few annotations. Moliata 6/27/17
Editing Files Anissa Alexander 6/27/17
Local server error: Server error: could not upload project. Please try again later Nir Vana 6/23/17
How can i forced app inventor to play this video player application only with out appear option of open with heikal 6/22/17
Proposal - SoundMeter component (Used to detect the sound level from the mic) Gareth Haylings 6/20/17
how do can like mit ‘About The Companion’ Yong Tang 6/19/17
Custom package names Hossein Amerkashi 6/18/17
barcode scanner Ion Stefanache 6/17/17
how to integrate an external activity into extension? tutu shan 6/16/17
Important information for extension developers Evan Patton 6/15/17
Using animation.xml mechanism for <supports-screens... ? Tomislav Tomšić 6/13/17
why ant error: [ERROR] Line 69: Rebind result '' could not be found Yong Tang 6/11/17
Build successfully but got no method error Jeng-Ping Lin 6/5/17
Build fails becouse of Blockly, any idea what is going on? Tomislav Tomšić 6/5/17
Re: [App Inventor Open Source Development] why ant error Jos 6/3/17
Return a List Pavitra 6/2/17
Some doubts regarding extensions Pavitra 5/31/17
Unable to build extensions Pavitra 5/25/17
Client TCP extension made, testers wanted ! Jean-Rodolphe Letertre 5/24/17
More topics »