Instapaper: It’s the little things…
There are many things I appreciate about the incredible design practices of Marco’s Instapaper but I have to admit it’s the little things that mean so much. It may be subtle at first but that’s exactly as it should be. Take for instance the page marker in Instapaper 2.0.

Marco described how arrived at the new paging option but what delighted me is when I noticed the page marker that cues you to how far into the article you are. Just 2px wide and slightly darker in contrast, this marker subtly informs you of your position in the article. I’ve called it out here but on the iPhone it runs along the edge of the screen. It’s truly invisible until you’re looking for something that serves this function. Then it’s right there as it always was. This is what good UX designers strive for: an invisible user interface that gets out of the way until you, the user, call upon it.
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