It tells you all the technical features of the phone, and some in real time parameters, such as temperature and CPU speed.
It is highly recommended. It's made by a tomshardware fan, so please, if you want, rate this app in Google Play. It will only take a second and it will be very helpfull for the developer. The more five star reviews haves an app, the more users can find your app in the search results.
The application is free and has no advertising.
PS: if you do BUMP more people can see this post and test the app, so the BUMPS are welcome