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 If you've ever coded for multiple display types, especially the web and then iPhone screens, and  just for grins throw in some Android screens including a few "Tablets" just for fun.

My experience is you can pretty much just lump the Android screens in with your PC or MAC screens.  They tend to be a fairly common size and they are fairly well behaved. But when it comes to iOS screens, all bets are off.  

Is it a small phone, or a big iPad., Is it HD display or not.   What is the input method, touch, type, or Pen?  Each of these require a different level of precision. 

As I am writing the post today, we already have well over 10 pixel densities.  Common ones include 

  • ldpi
  • mdpi
  • hdpi
  • xhdp
  • xxhdpi
  • xxxhdpi
  • nodpi
  • tvdpi

To help with all of this, I found two great sources.  One does a great job of explaining iOS displays.




Nowadays, not just iOS displays but may Android displays as well.  The other does a great job of everything else. I checked out my little Pulse Oximeter device the other day and sure enough it had a double density display on it.  Who would have guessed?

This next one is a great source on display densities.

Pixel Density


It's almost impossible to be perfect with basically unlimited combinations, but I hope these helps a little.  They did for me.

Sources:

"Pixel Density, Demystified.  How pixel density works and hot it affects your designs". 
Published June, 9, 2016. URL: https://medium.com/@peternowell/pixel-density-demystified-a4db63ba2922

iOS Device Compatibility Reference. No Publishing Date. 

Author Unknown.  URL: https://developer.apple.com/library/archive/documentation/DeviceInformation/Reference/iOSDeviceCompatibility/Displays/Displays.html




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