Google today launched a mobile version of Google Voice for Android and BlackBerry phones. The app makes outbound calling on the unified phone service easier and sends both calls and SMS messages directly through the Google Voice number, ensuring that any return calls go to all of the phone lines linked to the service. Dialing is integrated with the existing phone contact list where it previously required memorizing numbers.

The automated transcripts inherent to Google Voice also get a boost from the dedicated software. Voice messages pulled in are both available in transcript form but also played back with accompanying voice in a karaoke-like manner that highlights words as they're spoken.

Google's app is free for either mobile operating system, though it requires one of the currently closed beta Google Voice accounts.

In addition to the two current smartphone platforms, Google also says a version is in development for the iPhone. It tells the New York Times that it's "working with Apple" to get the app released but that, in the meantime, iPhone owners with Google Voice can still use the web app version. No timeframe is available for a launch and hinges on App Store approval.