Maybe there's some subtlety that I'm missing, but there are clear counterexamples: almost all iOS video apps support chromecast, including Netflix and HBOGo (an

Maybe there's some subtlety that I'm missing, but there are clear counterexamples: almost all iOS video apps support chromecast, including Netflix and HBOGo (and HBONow). Amazon Prime Video is the exception here. I'm not aware of any Google Play Services installed on my iPhone, and if it's something that's bundled with the apps, then Amazon Prime Video can bundle it as well. The situation on Android might be different; at one point I certainly could cast from Netflix to Chromecast on my Kindle Fire (even though no Google Play Services existed) although from looking around on Google a bit that appears to no longer be the case.