App Inventor is an intuitive, visual programming environment that allows everyone, even those with no prior coding experience, to build fully functional applications for smartphones and tablets. Those new to App Inventor can have a simple first app up and running in under 30 minutes. The tool allows anyone to program more complex, impactful apps in significantly less time than with more traditional programming environments. The MIT App Inventor project seeks to democratize software development by empowering all people, especially young people, to transition from being consumers of technology to becoming creators of it. MIT students and staff, led by Professor Hal Abelson, form the nucleus of an international movement of inventors. In addition to leading educational outreach around MIT App Inventor and conducting research on its impacts, this core team maintains the free online app development environment that serves more than four million registered users.