Is there an App Store yet for either Alexa or Google Home? I just got a google home and I want to program/add apps(games) or actions(movie times, order a pizza

Is there an App Store yet for either Alexa or Google Home? I just got a google home and I want to program/add apps(games) or actions(movie times, order a pizza, call x friend on skype, call 911, record & playback my sleep talking recordings and many other ideas thought of). I can't see why such an App Store isn't available yet for programmers and either Google or Amazon to profit from!!! One that is run like Apple's App Store where things are reviewed and approved, as for me I think these AI speakers are the next big thing like the iPhone.