The Amazon Alexa app is only downloaded from United State app stores.
Compatibility
The Amazon Alexa app is available on smartphone devices with:
• Fire OS 3.0 or higher
• Android 5.0 or higher
• iOS 9.0 or higher
You can also go to https//alexa.amazon.com from Safari, Chrome, Firefox, Microsoft Edge, or Internet Explorer (10 or higher) on your Wi-Fi enabled computer.
At this time, Alexa-to-Alexa calling and messaging is only available with the Alexa app on
compatible iOS and Android phones. To learn more About Alexa-to-Alexa Calling and Messaging.
Download Alexa App
You can go to the app store on your smartphone device. Search for "Alexa app," or select a link below:
• Amazon App store
• Google Play
• Apple App Store
Sign in your Amazon Alexa account. And install the Alexa app in your mobile device. After that, select your echo device from the list of on Alexa devices. Now you'll need to connect echo to wifi network. Add your language to your Alexa device. Alexa is ready to answer your questions.