Does Firebase have a server?

The server side of Firebase Cloud Messaging consists of two components: The FCM backend provided by Google. Your app server or other trusted server environment where your server logic runs, such as Cloud Functions for Firebase or other cloud environments managed by Google.

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What is FCM backend?

Firebase Cloud Messaging (FCM), formerly known as Google Cloud Messaging (GCM), is a cross-platform cloud solution for messages and notifications for Android, iOS, and web applications , which as of 2021 can be used at no cost.

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What is FCM token in iOS?

Getting FCM token By default, the FCM SDK generates a registration token for the client app instance on initial startup of your app . Similar to the APNs device token, this token allows you to target notification messages to this particular instance of the app.

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