For both the Q and Z devices it looks like StarTracker is already showing free within BlackBerry World for users. Originally a 2.99 application. StarTracker uses your phones sensors to show you in real time what constellations and stars you’re looking at up in the night sky. Just a great treat from BlackBerry and PYOPYO Studios! With hundreds of reviews and a 5 star rating go grab it while it’s free and enjoy exploring the world outside this one.