Google has a long history of decoupling apps from its version of Android. Sometimes, this is done to offer the pure Google option for users who have heavily skinned software on their devices; but, the majority of the time it is done simply as a way to allow Google to push out updates faster than if the app were connected to the Android system...Source: http://www.phonearena.com/news/Google-releases-Text-to-Speech-into-the-Play-Store_id49117
