You can leave a comment-only review on the iOS beta that we released today, but we are committed to adding line-by-line commenting for Pull Request reviews befo

You can leave a comment-only review on the iOS beta that we released today, but we are committed to adding line-by-line commenting for Pull Request reviews before we launch broadly. I originally didn't think that it would work until our engineers built a prototype and changed my mind. And since review comments are saved to the server as pending, you can even start a review on your phone, then finish on your computer (and vice versa).