Download Alexa app for iPhone

Most of the Smartphones allows you to activate your Alexa device. just by saying its wake word. mostly In the new comming phone, Alexa support is inbuilt in them.you can interface these gadgets with your Echo and computerize their capacities with your voice.  Download Alexa app for iPhone Echo devices are Bluetooth enabled, In which you can control the audio playback on your device by speaking to Alexa. This is to say that you will be able to play and control your Apple music service on Amazon’s smart speakers if the iPhone is what you use for your home entertainment.

Here you can see the smart features to Download Alexa app for iPhone Using Bluetooth to connect your iPhone to Alexa
You can connect your iPhone via Bluetooth, giving you the ability to start streaming and control the audio with the following :

1st or 2nd generation Amazon Echo
2nd gen Echo Dot
Echo Spot
Echo Show
Echo Plus

Initial pairing process

you can Be Pairing the iPhone with your Echo device via Bluetooth. first of all, take your iPhone near the Alexa device that you want to pair. On your iPhone, open the Settings app. Navigate to Bluetooth and open it.
Just Say, “Alexa, pair” to put the Echo device in Bluetooth Pairing mode. You can give a command, Alexa should give you an audible acknowledgment that it is searching and confirm when your Echo device is in pairing mode.

Streaming music and more.
Once you have completely paired your iPhone with Alexa you can open the Apple Music app and select the specific song or playlist that you want to stream. You can also stream audio from iTunes, Apple Music, Podcasts, and even the Apple TV.

Source: http://www.downloadalexaapps.com