this post was submitted on 06 Jul 2023
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Screen density is usually needed to work out the resolution of images to load. A high-DPI ("Retina") screen uses higher-resolution images than a low-DPI screen.
opposite really... Notice "Screen Resolution" is on that list as a separate item as well...
Screen Density would tell you roughly how big the screen actually is. If you have a 4k panel... but it's only 6 inches, you can probably serve up a 720p image instead of the full 4k one and the user won't notice the difference since you'd have to hold the screen an inch away to see anything different.
Doesn't screen density usually mean the pixel ratio? Or is it something different on Android?