Microblogging service provider Twitter Inc. has launched new versions of mobile apps for iPhone and Android devices.

The official Twitter Blog announced this development and also added that they would fetch support for Kindle Fire and certain Nook tablets as well. Further, it is also over-the-air for devices running on Android 4.0 Ice Cream Sandwich.

Once updated, the swipe shortcut would allow users to view a profile, reply, retweet or share a tweet without having to leave the home timeline.

The update features a find friends notification, giving an option to the users for uploading mobile contacts onto Twitter's servers.

The company's sole aim to introduce this feature was in response to the controversy that erupted a week ago when the blogosphere discovered that Twitter and other popular apps like Facebook and Instagram were swiping users' address books without notifying the users.

Twitter has introduced the copy and paste the feature for iOS devices. Furthermore, iOS users will also have several more additions, including the ability to email and tweet a link (via the share option) within a tweet.

Meanwhile, there is a buzz among the industry analysts that the company is expected to break the 500 million user mark Wednesday.

Twitter has remained tight lipped on the same. However, the release of these power pack updates Tuesday can make anyone think about the Twopcharts reports to be significant.

Twopcharts suggested that Twitter had 498,862,688 registered users. This is less than 1.2 million from half a billion, and at the current rate of sign-ups, Twitter will reach this milestone Wednesday.