Yes.

From the schedules page, the alarm icon in the top right of the screen will get you to the reminders page.  You can also get to the reminders page from the Settings page in the Schedules section.

You can add as many reminders as you want. The reminder time you enter is before your shift's start time. You can also add a personal message for each reminder or just take the default.

In order for reminders to work you must allow the app to send notices and have a start time on your schedule.