The app is capable of watching light or noise changes, the movement of the telephone and the access to some wifi you have previously set up.
For example, you can leave the phone in a dark room and programming it to send you an SMS when some one switches on the light, starts recording audio and taking pictures every a certain time. Or you can program it to start recording video whenever it enters in the range of a wifi.
You can also program it to start recording audio or video at a certain date and time. For example, start recording video tomorrow from 10 to 11 a.m.
The app has a log system which saves all the relevant information. So, you will be able to keep all the important events under control.
Obviously, this app can be used with illicit purposes. The author declines all kind of responsibility with this app. When you install this app on your Android device, you accept to use it under your exclusive responsibility.