All Kerika users have the option of getting an email sent to them at 6AM everyday, in their local time, that summarizes all the cards that are overdue, due this week, and due next week.
(Actually, we have two options for this email: you can get these cards summarized by due date, or by board. Or both.)
This is turned on by default for new users but you can change your preferences at https://kerika.com/preferences.
We have improved this email to include Tasks as well as cards.
This required some smarts in the code to handle scenarios where a Task’s Due Date is different from the Card’s Due Date, but we managed to do this nicely.