You can create your own apps for Android devices--and it's easy to do. This extraordinary book has been updated for App Inventor 2, a powerful visual tool that lets anyone build apps. Learn coding with step-by-step instructions for more than a dozen fun apps, including a text answering machine app, a quiz app, a Mole Mash game, and an app for remembering where you parked your car! The second half of the book features an Inventor's manual to help you understand the fundamentals of app building and computer science. App Inventor 2 makes an excellent textbook for beginners and experienced developers alike.