TaskAlert monitors your Google Calendar (and Task apps soon). If you tag an event as 'Critical' and don't mark it done by the deadline, it calls your actual phone. It's a reminder that you cannot ignore.
Why: Because push notifications are too easy to ignore. I so good at making plans and setting up calendar reminders, but then I just ignore them because I am overwhelmed or distracted with something else. I thought about what is a thing I can't ignore? It's a friendly call from a friendly and concerned friend, that's TaskAlert.