According to a blog post by Tim Bray, on the Android Developers blog, Google is planning to add content ratings to every application on the Android Market.
Starting next week, developers will have to specify a content rating for the applications they submit to the Android Market. All existing applications will have to be updated with the content rating information in a specified time frame, failing which a default rating of Mature will be added to the application.
Developers will be able to choose from four content rating levels – “All, Pre-teen, Teen, & Mature”. This upgrade to the Android Market will coincide with the launch of Android 2.3 Gingerbread. Apple has supported content ratings on the iPhone App Store since the launch of iOS 3.0.
For more details about content ratings on Android Market, check out this Android Market help post.