Google has launched the Google Voice mobile app for Blackberry and Android phones.

This new mobile app allows users to make calls and send SMS messages with their Google Voice number directly from their mobile phone, unlike previously where users had to dial their own Google Voice number from their cell phone or use the Quick Call button online. The app is fully integrated with each phone’s contacts, so users can call via Google Voice straight from their address book.

Features available are:

- Access to voicemail: read message transcripts, follow along with “karaoke-style” playback of messages, read SMS messages sent to your Google Voice number (even if your phone doesn’t receive SMS messages) and access your call history
- Place calls that display your Google Voice number from your address book, the app dialer (Blackberry) or the native dialer (Android)
- Send SMS messages that display your Google Voice number
- Place international calls at low rates

The app can be downloaded from the Google Voice mobile site at m.google.com/voice. It’s also available in the Android Market.