🔔 Push Notifications

Remote notifications delivered through the Apple Push Notification service (APNs). Your server (or a provider like Firebase, OneSignal, or RevenueCat) sends a payload to APNs, which delivers it to the device. Authentication uses a single APNs Auth Key (.p8) that works for all your apps and never expires — strongly preferred over per-app push certificates.

Any time you message users when the app is closed: chat, order updates, reminders, re-engagement. Also required for silent background pushes (content-available: 1) and for RevenueCat/serverside subscription event delivery to the device. Not needed for purely local notifications (UNUserNotificationCenter scheduled on-device).