Marco Arment has an interesting writeup on his blog about his iOS app Instapaper (and of course the web service that runs behind it). Arment says on his blog that he's quietly been removing the free version of the app from the App Store, and that's resulted in a surprising effect: Sales of the full app have actually increased. Because of this, Arment says he's rethinking a free version completely, and may not bother ever bringing it back to the App Store.
Traditionally, free or "lite" app versions are very helpful -- they give users a taste of what the app does without any overhead costs to them but the time to download, and they can raise
