I'm confused where this can be used. Reading the website it looks like your app needs to be in the amazon marketplate? Or can their analytics engine be used on apps distributed through google play?
The analytics also work on iOS so I presume you can use the Android one on Google Play. It wouldn't make sense to restrict it to Amazon if they also offer an iOS version.
ftfa: A single destination to track your iOS, Amazon and Android apps.
Keep in mind, there are many android app stores out there, not just Google and Amazon. I'm sure you could push any kind of metrics your heart desires, not just Apps.
