By design, most Alexa-powered devices can be controlled entirely with voice commands right out of the box—just say “Alexa” and your Echo speaker, Fire TV or other Alexa device will respond, no button-presses or taps necessary. The rare exception is the Alexa smartphone app, which requires users tap an “Alexa” button…
How to Use the Alexa App Hands-Free
Source: Life Hacker
