Travis CI can notify you about your build results through email, IRC, chat or custom webhooks. Apple Push Notification Service: This is the central hub responsible for the delivery of notification messages on iOS devices.Registering your app with APNs. Communicate with Apple Push Notification service (APNs) and receive a unique device token that identifies your app. Go to Settings > Integrations. Search for Travis CI and select Add. Enabling the Push Notification Service. First, you have to change the bundle identifier. In this codelab, you'll add push notifications to an iOS app with Firebase Cloud Messaging. Fill out the Register an App ID page, and be sure to check the Push Notifications checkbox, then click Continue and Register.