Glow Blogs do not support mobile apps for Blogging. The iOS and other blogging apps do not support authentication through RM Unify. Possible workarounds are not implemented for security reasons. WordPress now provides a pretty good experience in a mobile browser.
(This post, including the video upload, was edited in mobile safari.)
Here is a short screencast showing posting to a Glow Blog from my phone. Might look a bit better if you hit the fullscreen button on the bottom right of the video.