This application does absolutely nothing. It was originally created for Android development and testing. It is useful for testing application condition detection, app launching and killing, and auto task killer priority management. Unlike other "nothing" apps, this actually does what is described. There is no blank window. There is no UI, and the app icon is transparent.
The download of this application doesn't contain viruses or any kind of malware. The app is created by ConceptualTriad and its category is Tools. Google Play shows that Null App is rated 3.8 by its users.
Over 100K users set up this application and its most recent update was released on Jan 21, 2013. Download the setup package of Null App 1.1 at no cost and have a look at users' reviews on Droid Informer. The app works flawlessly on Android 1.6 and higher.