"No filter is 100% accurate, " said Stephen Balkam, chief executive of the Internet Content Rating Association.
Vine is not yet available for Android, but Google Play rates its 500px app as having a "high maturity" content rating, while Tumblr is marked as "low maturity".
We tend to agree with Wold, but we are content to leave our rating unchanged at Undervalued.
The roots of the betrayal go back to June 1996, when the notion of rating Web content first took off.
Most such games, called "first-person shooters, " are rated M for Mature by the rating board indicating content is generally suitable for ages 17 and older.
For now, we are content to reaffirm our Overvalued rating on CPKI until it can show that fundamentals are improving or the stock declines just a little further.
We spent a few minutes poking around Explorer, and the app seemed to work well, with an intuitive structure and useful added content, such as a Rotten Tomatoes rating atop each film's cover art.
User-generated content can be voted on by players with a star rating, so it will be easy to find the popular, high-quality stuff.
Because the gaming industry, through the Entertainment Software Rating Board, voluntarily labels games based on their content.
The Pan European Game Information system (Pegi) gives games an age rating as well as additional information such as violent content and bad language.
Already one of the top free apps on Android Market, with more than 50, 000 users giving it a 4.5-out-of-5 star rating, Flash Player 10.1 brings rich Flash based content to mobile devices inside the browser.
All games are categorized by not only their overall rating (E for Everyone, T for Teen, M for Mature) but also the specific content found in the games.
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