Kindle is a monochrome screen for reading...thats it...but if you read a lot it is a very easy screen to read as it has e-ink. Like a book, it is easier to read the more light there is.
If you only read occasionally, get a tablet and enjoy all the other things it does.
If you read a lot, get a kindle..I got the paperwhite one with backlit screen for clearer text and ability to read in no/low light.
Kindle Fire is just a tablet with the kindle name on it.
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