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This follows news that Vine accidentally featured a pornographic video to all users this morning. Twitter said in a statement that the pornographic video was featured due to user error.
As of this writing, Vine is still available for download.
According to Apple's developer guidelines,
There is a lot of user-generated pornographic content on Vine and you can easily find it by searching through hashtags such as "#sex" or "#porn."
Vine launched last week to a lot of fanfare from the tech press. The app lets you share short, six-second videos with your friends.
Apple declined to comment.
We're still waiting to hear back from Twitter.
In the meantime, learn how to use Vine below: