Thanks, Avtrician, that's good to know. I guess there's only one way to know if it's a real working tool, and that's to buy one of the new larger screen phones and install the app. Without question, I found Kindle for PC on a 21" screen very relaxing and the manipulation of text/word-count every bit as good as Adobe reader.
One of our illustrious members kindly did part of the proof reading of my book while in transit, so Kindle reader or phone, what he really proved is a good eye is the important factor and can be done with the smaller devices when the operator has the skill.