Apple Reminders is one of the most underrated productivity tools on the iPad. It is simple, fast, already installed, and works naturally across iPhone, iPad, Mac, Apple Watch, and Siri. You can capture a task the moment it appears in your head. You can set dates, repeat tasks, organize lists, and get notifications. And yet, for many people, Apple Reminders alone is not enough. The problem is not that Apple Reminders is bad. The problem is that a reminder is…