A few months ago I downloaded a program for my phone - Sleep as Android. I bought the premium version of the app for the extra features to record sound throughout the night when volumes reached a certain threshold. It would activate when I would snore or move around. I would usually spend the next evening going over some of the recorded sounds. Everything was pretty normal until I listened to something out of the ordinary.
It was near the beginning of April, and I had the apartment to myself. I'll let you listen to the sound before I go on explaining it: https://dl.dropboxusercontent.com/u/10931795/APR102013-032352.mp3
It started out picking up my snoring, and then the hairs on my neck stood up as I hear my doorknob moving. Following this, you can hear my door open slowly.
I was confused and a little worried. Everything was still locked up, nobody came home (the chainlock was still latched on the front door), and my landlord certainly didn't come.
I don't use the app anymore.