You can link Papershift to your Google calendar and have a reminder sent to you before a shift begins.
You can get started right away if you already have a Google account, otherwise set up an account under: https://calendar.google.com/calendar/
Gear icon (Settings) in the left navigation → click on your name or on "My Profile" → calendar synchronization → click on Google Calendar and register with your Google account
You will then see that the Google Calendar is linked to your Google account.
If you have preset your Google Calendar to send a reminder before an appointment, you will get another reminder when the shift starts 😉