What is App Inventor?
App Inventor is a free and open-source web platform that allows learners, hobbyists, and inventors to create mobile applications through a graphical drag-and-drop interface.

We were founded in 2007 by researchers and developers at MIT and Google with the vision of enabling anyone—including those who may not think of themselves as coders—to create mobile apps for real, effective change in their communities.
MIT App Inventor has been a powerful tool for me to develop applications that solve real-world problems. Gitanjali Rao, TIME's first Kid of the Year (2020) and inventor of Tethys, Kindly, and Epione