First read: <a href="http:&#x2F;&#x2F;www.androidauthority.com&#x2F;amazon-new-app-forced-google-574104&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.androidauthority.com&#x2F;amazon-new-app-forced-google...</a> to understand that Google won&#x27;t allow competing app stores. (<a href="https:&#x2F;&#x2F;play.google.com&#x2F;about&#x2F;developer-distribution-agreement.html" rel="nofollow">https:&#x2F;&#x2F;play.google.com&#x2F;about&#x2F;developer-distribution-agreeme...</a> for more details section 4.5)<p>As per this document: <a href="https:&#x2F;&#x2F;developers.google.com&#x2F;cast&#x2F;docs&#x2F;android_sender" rel="nofollow">https:&#x2F;&#x2F;developers.google.com&#x2F;cast&#x2F;docs&#x2F;android_sender</a>
You need Google Play Services (see <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Google_Play_Services#Concerns" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Google_Play_Services#Concerns</a>) to write an Android app with the Cast API.<p>Because of this, Amazon cannot distribute Google Play Services on their own Android devices and therefor cannot use their own Android devices to cast to a Chromecast. They could enable Prime Video on other Android devices but not their own. They feel this will cause confusion and therefor have decided not to write a Prime Video app for Chromecast. Saying &quot;oh, Amazon just doesn&#x27;t want to write a Prime Video app for Chromecast&quot;, while true, doesn&#x27;t truly explain the complexities of the situation.<p>The business decision to remove Chromecasts from the network steps from the above desire to prevent confusion. I personally don&#x27;t agree with it but I understand it.