You can configure org-mode to be a two pane organizer. There is a mobile version in Orgzly or Mobile Org. I keep some of my org files in dropbox and edit them o

You can configure org-mode to be a two pane organizer. There is a mobile version in Orgzly or Mobile Org. I keep some of my org files in dropbox and edit them on the go with Orgzly. That said, orgzly doesn't support encryption, which is a bummer. Neither of them are rich text, either, though you can use markdown.