The Amazon Kindle ereader app is arguably the best way to read ebooks on your Android phone or tablet, but the one drawback is that you can't change fonts. The default font is pretty darn decent for the screen—DroidSerif if you were wondering—yet still has the vital flaw of being a serif font. For those of you who don't know, serif fonts have the small, curved lines at the end of characters, where sans serif fonts have solid ends. And because your phone or tablet is a screen, sans serif fonts have better legibility (where serif fonts are better for print, like for actual physical books). More »