What a great idea for people that don't have too much time! I personally try to stick with the same topic every night(something on the theme of "what went well" or "what are you grateful for"). However, this is a great way to speed things up and start putting ideas/thoughts on paper. Also keeping it locally stored is great from a privacy standpoint.
My only question: is there an "open" feature that makes the prompt optional for folks who maybe have something more pressing to journal about than something that the prompt may suggest that day?