NetCaptain sends reminders, published schedules, changes and cancellations as push notifications.
Tap the bell at the top of the app. If it says Notifications are off for NetCaptain, tap Open Settings and turn them on for NetCaptain in your phone's settings.
If it says the device couldn't be registered, tap Try again.
Notifications go to the phones you've signed in on. Sign in on a new phone and it's registered automatically.