How to Use the Alexa App Hands-Free - Lifehacker

You’ll have to have the app loaded first, so it won’t be quite like using an always-listening Alexa smart speaker, but you can still keep the process fully hands-off by asking Siri or Google Assistant to take care of launching it for you.

That quirk aside, enabling this feature makes using Alexa on your smartphone a lot more convenient.

Just make sure you keep an eye on Alexa’s responsiveness: Voice assistants are prone to unwanted activations, a fact that has serious implications for user privacy.