&gt;<i>f.lux seems to be an exception to this.</i><p>Only developers or computer nerds even know about flux in the first place.<p>&gt;<i>I&#x27;m not sure if you&#x27;re right in saying that &quot;only developers or computer nerds&quot; want to install apps other than those in the App Store.</i><p>Because most &quot;regular&quot; users don&#x27;t even know there are apps outside the app store.