For a new user, they may have no idea that this is a 30 day trial until they download and run the app, and I don't think that there is pricing information on the website anywhere. Not necessary to have any of this, just some feedback :)
Yep - it's a 30 day free trial. After that it's $9/month. Like GitHub, we're also offering a plan for organizations that want to provide Ship to their whole team.
If you cancel or your trial expires, Ship keeps working but it only works with your public repos. The intention is that Ship is always free for open source.