Seems to be getting a lot of press with recent releases for iOS and Android...

Chomp connect api allows users to:
* Choose to automatically prompt their users to review after a set number of app launches, OR let users choose when to review
* Drive positive reviews of your app from engaged users, rather than just deleting your app
* Drive downloads within Chomp; more reviews means more exposure in the activity feed and an increased likelihood that your app will be recommended