QDisplay app for iPhone and iPad

Are you planning to buy a TV and dont know where to correctly position your sofa? Or do you just need to know the pixel density on your gadget screen? The Quality Display application will help you with this. You only need to specify the diagonal size and the screen resolution, and the application will do the rest itself.
The application will evaluate your screen, as compared to the reference value. This will allow you to choose the optimal distance from the screen so that your eyes cant see the pixels on it. Thus, the application is able to help you with your budget to avoid overspending on redundant screen resolution.