Due is a hybrid of a reminders app and an alarm clock. You can set one time or persistent reminders for things like moving the trash to the curb, clocking in or out at work, changing the filter in your Britta, the time you need to make a phone call or visit someone’s office. You can’t ignore Due. It’s alarms repeat every minute on the minute until you turn them off, up to five times by default and configurable up to ten times. It also has reusable precise countdown timers for things you repeat constantly like brewing tea. It has natural language input capabilities. It’s a snap to set up a reminder on the fly. It cost $7.99 for all the features it has right now and has an IAP to insure your rights to upgrades. There is even a Mac app that syncs via iCloud. I’ve had Due on my homescreen since iOS 4. You should add it to yours.