Android devices have greatly diversified with the explosion of Chinese exports, there were the kinds of brands that have dozens of models on the market. Manufacturers claim something in terms of mobile hardware specifications but not infrequently were caught in a lie.
I will present a free application that shows every aspect of every hardware in your phone or tablet. With this application you can check the simple things such as processor speed, RAM capacity up to technical values such as sensor type and calibration data about codecs and properties of the GPU (GPU)
The application is called Hardware Info and can be downloaded free here At first glance, the app has a simple interface in the form of a list based on categories.