&gt; it has a restrictive 14 page license attached to it that you must agree to to use it &#x2F;&#x2F;<p>That you&#x27;re <i>supposed</i> to agree to. What proportion of the users of Xcode do you suppose have even read that license?<p>Also the license doesn&#x27;t prevent you using it, though it possibly prevents you from legally using it for commercial purposes in most developed nations.<p>With the recent case concerning sending data abroad to process to circumvent patent restrictions it seems that f.lux could just have someone in a country with no copyright&#x2F;license restrictions download Xcode, compile and make available the software. Apple Computers after all wouldn&#x27;t own code created with Xcode, which would be a technical rather than artistic work anyhow, so there doesn&#x27;t appear to be a problem of copyright.<p>Apple could likely still pull strings that the f.lux people wouldn&#x27;t find helpful however (maybe the devs have other apps that Apple could block, for example).