Hello App Inventor!

Preface

We think writing computer programs is fun and that those who can do it can make a difference to the world around them—sometimes in an almost magical way. But when you start out, it’s often hard to see how the programs you write can make any difference to anyone—for example, you might just be drawing simple shapes or adding up a bunch of numbers.

Back in 2012, we started using App Inventor with teachers and children and discovered it was a brilliant way to make computer programs that worked in the real world. Beginners could perform useful, imaginative, and fun tasks like a GPS treasure hunt or a homework excuse generator. The App Inventor books that helped us learn were great, but we wanted to focus on helping school-age kids and beginners ...