In Trello’s iOS and Android mobile apps, you can set yourself up for success by selecting a special time frame for when you'd like to be reminded of an upcoming due date.
Configure due date reminders for iOS
Open a card to add or edit a due date. Check the Set Reminder option to ensure it is enabled. Choose a reminder time frame (1 Hour Before, 2 Days Before, etc) that makes sense for your team or project. Press Done in the top right corner to save your Due Date and Reminder.
Configure due date reminders for Android
Open a card to add or edit a due date. Choose a time frame option from the drop-down menu (1 Hour Before, 2 Days Before, etc) and press the Done option. Nice!