The crux of the issue for me is that quitting is not logging out. This is not what I expect, it's counter-intuitive (and dangerous). The way Evernote seems to work, both on my Mac and iPhone, is that if I just quit Evernote, it’s not protected. Launching the app opens it up logged on, so anyone who gets onto my Mac or my iPhone also gets into my Evernote without having to log on. This is too easy an error to make (from a security point of view) and one which I’ve been making unknowingly for months. So, I think you might want to add an option to your app so that when quitting Evernote