Hi this is Michael, I'm one of the creators of Flo. We gave it that name because our vision is to create a kind of 'workflow for the rest of us' - an app that makes everything easier without being complicated and geeky. A challenge, I know.
What separates Flo from other 'all-in-one' apps like Outlook is mostly behind the scenes. For example, Flo features a system of linking items to each other: Swipe an email to create a new event or to do, and Flo creates a link back to that email. That eliminates more than half of the hunting and pecking that drives me crazy.