The free download is intended for those who purchased Clear+; however, anyone can grab the app freely.
"To make sure as many people as possible can move to Clear, we’re going to do this twice in the next few weeks. We know this is risky - we rely on the income from Clear to run our small, independent company - and so whilst this was by no means an easy decision for us to make, we simply want to do the right thing for you, our customers."
More details on the reason behind the move can be found here. Download Clear from the App Store at the link below and please follow iClarified on Twitter, Facebook, Google+, or RSS to find out the next time Clear goes free.