Probably an offtopic for your offtopic, but:


I use my phone to read e-books:

- AMOLED screen (black color doesn't emit light).

- low level of brightness (so I can read in the night without "losing" 
melatonin). Usually e-book reading app gives you this option.

- the PDF reading app must have reflowing of the text, so you can choose 
the size and font you like.

- no blue colors (ie yellow "face" with a black background). Not sure 
about its effect, but everywhere I read about blue filters. 8-)



Orgzly I use to capture ideas; and other tasks related with 
auto-organization (GTD). Of course, the .org files are sync with my 
computer.

For reading org-mode documents on mobile, I haven't found the perfect app.