Tap locate, search a street, or tap the map where you parked.
Every curb in SF, colored by its next street sweep:
Tap the curb where you parked — you'll get the verdict, down to when tickets actually land on that block.
What CURB does →Apple only allows push notifications once CURB lives on your Home Screen as an app.
Already a Home Screen app? Make sure you opened it from the icon (not Safari), then try again.