title_body: Do non-Windows devices have equivalent of ClearType for ebook font rendering? Cleartype is Microsoft's subpixel rendering technology for improving text clarity.
  
  I recall it being used as a selling point for MS Reader and .lit format back when it was introduced.
  
  Are similar technologies used in modern book readers (either in the reader app itself, or underlying OS)?
upvoted_answer: On devices that use eInk, there are no subpixels like the Red, Green and Blue subpixels that can be separately addressed on color screens. Hence there is no subpixel rendering as such on eInk devices (as stated by Sriram Peruvemba (chief Marketing Officer at  E-Ink Holdings).
  
  3rd generation iPAD has subpixel rendering according to the same article, but it is not supported by every application.