https://www.amazon.com/Amazon-com-Amazon-Prime-Video/dp/B00N...
Edit: it is on Play Store apparently. Might changed recently
https://play.google.com/store/apps/details?id=com.amazon.avo...
the "standard" one just ships to certain countries, the "basic" one only ships from certain places to certain other places
I installed it from there on my devices when Prime Video launched worldwide in Dec 2016.
[1] https://techcrunch.com/2014/09/09/amazon-brings-prime-instan...
https://sixcolors.com/post/2017/12/amazon-prime-video-now-av...
So there is at least an amazon video app on android in general, if it can't be on the google store I don't know.
Maybe they've got a deal with Amazon to pre-load the app? I did sideload the Amazon app store.
The iOS app works, but you can't purchase from it (I speculate because Apple would get a cut). Same goes for the Kindle app.
This is so weird and dumb it's unbelievable. There is an Amazon Video app for iPhone and iPad why are they not supporting Android?
There is one for Roku but they have been dragging their feet with supporting the AppleTV even though they promised one "by the end of the year".
They support AirPlay to AppleTV but not ChromeCast.