Wow, that's...creepy. I usually like ghost stuff but I think I was with my ex for too long and would convince myself that the app was created by the government and it is saying all that because they are watching me. >_>
I think it's an app that is aware of what's going on around you. I just don't see it being a ghost thing.
I do believe in ghosts, but this is just a little hard to believe.
For me to be convinced the "spirit" would have to tell me who they are, when and how they died, and wht they did not cross over yet. I would then have to verify it. Telling me events that are happening around me is not proof that they are real "spirits".