Watch out Siri, there’s a new virtual assistant in town. From Nuance Communications (NASDAQ:NUAN) comes Nina, a speech based assistant that uses voice recognition and text-to speech software to help the everyday mobile user.The new app will be far superior than its competitors, such as Apple’s (NASDAQ:AAPL) Siri, according to Nuance. The company says it is the first virtual assistant app to incorporate both speech recognition and voice biometrics. So Nina can not only understand what is being said, but can also identify who is saying it. Nuance also claims Nina has a high level of interactive dialogue and language understanding and allows for personalization, including her visual appearance. The app open software development kit, the first virtual assistant to offer such a program, is available today in the US, United Kingdom and Australia with more languages to come later this year.