It will definitely work from your phone. You can't view offline (a bummer for subway rides!) but everything else works and you can still grade tests, etc from the mobile apps. I am really into the curriculum, even just the starter one. Recommended.
From what I know, LSAC counts every single grade for every single class you took during your undergrad. I would ask them about your 0-credit course, because if it's a 0-credit then it probably shouldn't be on your transcript...?
Sounds like it could be a bit gray area, but if they willingly let you see, you might be alright. My issue is with the making edits. This is honestly above my pay grade though, haha. Sorry I can't be of more help.