Beginning next week, for all new and updated games they add to the Android Market, Eric Chu, who works with Google's Android Developer Ecosystem, wrote in a blog post.

Developers will also have to rate their existing apps over the next few weeks. If they don't, the applications will be rated "mature," he wrote.

Applications will have one of four ratings: all, pre-teen, teen and mature.

Google is making the change in response to Android users asking for more information about applications, Chu said.