Determine the Pixels Per Inch (PPI) density of a display. Essential for assessing screen sharpness on phones, monitors, and tablets.
Yes, higher PPI means smaller pixels and a sharper image. Above 300 PPI is generally considered 'Retina' quality where individual pixels are invisible at normal viewing distance.
Similar, but not identical. PPI refers to screen pixels, while DPI (Dots Per Inch) refers to printer ink dots.
Higher is sharper.