Seth Godin:

The argument goes that making software powerful rarely pays off, because most users refuse to take the time to learn how to use it well. The violin and the piano, though, seem to permit us to create amazing music, if we care enough. The trick is to be both powerful and simple, which takes effort.

This trick of being both powerful and simple is where many of the best iOS apps shine brightest. Take for example apps such as OmniFocus, Drafts, Fantastical, VSCO Cam, Diet Coda, or Unread. These are world-class, desktop-quality apps. They are extremely powerful, yet because they’re built for the iPad and iPhone, they are also quite simple to use and navigate. Now, combine that with the one-window-at-a-time workflow of iOS and you’ve got an even more “simplified” user experience.

Seth Godin on Software