Know About Alexa App and Amazon Echo Dot Here, is the full information about Alexa app and Alexa setup. Amazon Echo dot is popular nowadays because of its skills and features. To use Amazon echo dot, first, you need to download Alexa app. Just follow a few steps for Echo dot setup and Alexa app for Echo. You just need to have an Amazon account for Alexa login, Alexa app for Android and echo app.