The new iFly phone layout mode is quite readable, even on the small 3.5" iPhone 4C. Many android phones have a 4" or larger screen, making it even more readable. Use "Setup => Screen Settings => Font Size" to set font size to Large or Very Large, if needed. In a bouncy plane, though, not sure how well the small screen will work for you. Sitting at home, it's quite nice, IMO.
Also, the iPhone release should be available to the public within a month.