Tutorials for App Inventor

This tutorial helps you to build an app that allows the user to instruct an EV3 LEGO robot to do certain maneuvers and actions through voice commands. The user can pick one of several commands: forward, backward (reverse), stop, forward slow, forward fast, disconnect, circles, right turn (turn right), left turn (turn left). The robot will follow the user’s voice commands and perform the action for half a second before prompting the user for another command. If the user provides no commands, the previous command will be executed until another command is registered.

Hello Purr is the Hello World tutorial for App Inventor. This simple exercise takes you through the very basics of App Inventor. In a very short time you will create a button that has a picture of a cat on it, and then program the button so that when it is clicked a "meow" sound plays. This version of the tutorial is for use with App Inventor 2.

By building the Get The Gold App you will get practice with setting visibility, using Clock components and Timers, and detecting collisions in App Inventor. You'll program an application that has a pirate ship whose goal is to collect all the gold on the screen.

The location sensor object is used to communicate with the global positioning satellite receiver (GPS) in your phone/tablet. When the LocationSensor communicates with the built-in GPS receiver, the GPS can determine the location of your device.  The sensor can also work with network/wifi location services.  Finding a location using the network uses very different techniques to determine a location. Location means, the device's present latitude and longitude or it can mean your street address.