Night Vision Spy camera for PC will let you take photographs and spy on people at low light. If you want to keep a watch on people entering your room you can install this app in your PC. However, the app is especially designed for android devices. You can point your phone to any object at low light, take photographs and save in your phone or tab. It has a night vision effect image enhancement algorithm that is unique in nature and can enhance the images taken in very low light and render them legible. To use it just point your phone towards the object. If the object is out of focus, just point the phone away and bring back to position, it will focus on the object. Press the tab for clicking photograph and the image will get saved in your phone memory.
Though Night Vision Spy camera for PC is originally designed for android devices it can also be played in your PC. Just install an android emulator like Bluestacks and access the app through it.