Do you think we really need a web app that does something this simple that can be accomplished via any existing email app/product? And I'm not trying to be a dick by saying that, I'm actually curious. I feel like I see sites that would do something like this (do something general, something that could easily be done with an existing app/product) a bunch of times each week that seem neat for a min, but then I completely forget about them. It always ends up being that the existing app/product you use a 100x a day is just easier to use/remember.