Solodarkprince: The problem with the apps that you are requesting is that they lack usefulness. A Ghostbusters:TVG pke meter app would have a limited audience. Those in the ghost removal business already have highly specialized equipment to detect and remove ghosts. Such equipment has expensive sensors which are unavailable on phone handsets. Thus, such a meter would not be very useful.
As for the motion tracker from Aliens, I would imagine there are would be community of amateur alien trackers who might want to be able to track aliens from their phones, at least for personal safety. Such a phone app would offer this kind of convenience. I wonder whether most Android handsets have the array of sensors to motion track aliens. This is beyond my expertise. I know that I would appreciate the safety of having an alien motion tracker on me at all times. Please let me know if you can find anyone to fulfill this request.