I would like to be able to have other peoples tempests on the app. The data is already public on the web. This is a huge shortsightedness. Once this is done, then there is no need for a guest account. If the tempest does not belong to you, you cant change it, just view the data.
The exiting list should hold the tempests that you select. So, really, not much is required to have this feature. And this need not affect the API.