Google posted a note on the Android Developers blog that they will be introducing content ratings for the Android Market. This will start showing up within a few weeks and “will provide users with additional information to help them select the best applications for them”. There will be 4 levels in which developers will categorize their apps: All, Pre-teen, Teen, & Mature.
“To prepare for this launch, starting next week, developers submitting new or updated applications will be required to include a rating for all applications and games uploaded onto Android Market. In addition, developers will have the next several weeks to add a rating to their existing applications and games. Once content rating is visible to users, any applications or games that do not include a rating will be treated as “Mature”.”
Apple did this with their App Store and Android developers will most likely be gunning to be included in the “All” category, but here are some guidelines they’ll have to follow. Apps with “Alcohol, Tobacco, Drugs, Gambling, Profanity, Crude Humor, Sexual and Suggestive Content” should be rated Teen or above. Location-based app should be rated All but has some limitations. Those apps that enable users to publish or share their location should be rated “Teen” or above. Also, Hate speech is not allowed in Android Market.
Source: Android developer blog