The ways people are interacting with their computers or mobile devices are changing. Opening an app and typing, tapping, and clicking is too much work for today’s demanding users. Why type if you can use speech? How can you use the functionality of your apps with talking to the device? This presentation will show how to use voice command systems yourself, from implementing Siri in iOS apps and Google Assistant in Android apps to using Alexa Skills Kit to build custom skills with Java.