Here, you are able to download Alexa app from the app store or Alexa.amazon.com and control your home gadgets. Alexa app is used to make changes in your Amazon echo dot or another device. How to set up Alexa? If you want to control your home gadgets, first you have to get the Alexa app for pc, Android, iOS, etc. After that, go to Alexa login and connect echo to wifi. For Alexa setup, go to Amazon Alexa app settings add your details in it. Select Amazon Echo device – echo setup, echo dot setup.