well for reading only the articles without ads is called "Reader".
about the feature in safari to read articles later is called "Reading List".
about the reading list, i don't use it because i already have instapaper which is built in in "Reeder" RSS app.
and about the "Reader" feature, it's really a life saver, my small 3.5" iPhone screen becomes enjoyable again to read article in a website.
it makes reading much easier on the iPhone's 3.5" than any 4"+ android screen.