This idea has been brought up a few times, but there's been a few complications and delays as to when it will, if ever, be released.
One such complication is the compatability of the application across a wide variety of android devices, each of which have different processors and the like, which means more work has to be done to make it compatable for each device.
Most importantly, it's entirely down to Stefan and Unixmad and whether or not they can be bothered to do this at all.