I started using Due when it was released about four years ago, and I’d wager that I’ve used it every day since. Today Due reminds me to take meds, to pick up and drop off the kids, to get the mail and so on. I depend on it, and it has never failed me.
Version 2.0 was recently released for iOS and it’s more beautiful and functional that before. I can’t think of another third-party app that’s been on my home screen for four years. It’s a steal at $4.99 for new users. Existing users can upgrade for free and unlock all of the new features for $2.99.