A magazine I was reading recently did a comparison of iOS and Android. They came to the conclusion that there was not a lot to choose between them but that iOS was easier to get started on and seemed more intuitive initially but that Android was more flexible and capable in the longer term, but you needed to explore it to get the best out of it.

I keep most of my song words on my Android phone in pdf format and I find it very useful for a quick check before I sing. It's possible to expand the font size in Android to a reasonable readable size but you certainly can't sing from it.

For songs I am learning I put them on the Kindle. I tried pdf initially but I don't find that satisfactory. You really need to get them into an ebook format, which for the Kindle is Mobi.

After a bit of reading, I eventually found that the standard eBook formats are based on HTML so I have formatted my song words as html and used Calibre to convert them to Mobi. You can do a "quick and dirty" conversion by saving your song words as .rtf files and converting them using Calibre but the formatting does not come out very well. I tried Amazon's conversion service but that was useless for songs as they are just converted to continuous text as if they were prose.

I don't have a tablet though I might consider one when I come to replace my netbook.