Ranked in these QuestionsQuestion Ranking
Pro No sign-up required
No need to sign up on some external website. Works out of the box.
Pro Works with iOS reminders app as well
Not proprietary, easy to switch back to the built-in iOS reminders.
Pro Supports workflows
It has workflows to automatically move and reprioritize reminders. And these changes will even be reflected in your iOS Reminders app. E.g. If you have a "Call" list and you say to Siri "Remind me to call mom" then it will automatically move it in there. Or you can set up a rule to move reminders containing your boss's name into your "Work" folder.