What is GCM & FCM Cloud based Messaging?

Cloud Messaging solutions offer universal accessibility, enabling users to access messages anywhere, anytime, and through any device.These solutions come in two types: GCM (Google Cloud Messaging) and FCM (Firebase Cloud Messaging).

GCM:

Google Cloud Messaging (GCM) is a free service that facilitates messaging between mobile apps and server applications. It enables developers to send messages between servers and client apps.

GCM is a service that handles the sending, routing, and queueing of messages between server applications and mobile client apps.

A client app is a GCM-enabled app that runs on a device. The app server  is the GCM-enabled server that your client app communicates with through GCM.

Google & Firebase Cloud Messaging

 

FCM:

Google introduced FCM (Firebase Cloud Messaging) as the new unified app platform to replace GCM (Google Cloud Messaging).

Firebase Cloud Messaging (FCM) is a cross-platform service that handles the sending, routing, and queueing of messages between server applications and mobile client apps. FCM is the successor to Google Cloud Messaging (GCM), and it is built on Google Play Services.

Using message targeting, FCM is able to deliver messages to applications in three ways: to single devices, to groups of devices, or to devices subscribed to topics. Developers have the option to create messages in the Notification composer, which can send targeted messages to specific segments of users. Firebase Analytics fully integrates these messages, tracking user engagement and conversion.

Google & Firebase Cloud Messaging

Why we need to migrate from GCM to FCM:

FCM (Firebase Cloud Messaging) is an improved version of the Google Cloud Messaging. It inherits GCM’s core infrastructure, with new SDKs to make Cloud Messaging development easier.

Following are the benefits of  FCM SDK:
  • Simpler client development
  • An out-of-the-box notification solution. One can use Firebase Notifications, a serverless notifications solution with a web console that lets anyone send notifications to target specific audiences based on Firebase Analytics insights.
Is GCM deprecated:

As per Google team update, they are still continue to support the current version of GCM Android and iOS SDKs because a lot of projects use GCM technology for real time communication. It is recommended to use FCM SDK moving forward.

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Google & Firebase Cloud Messaging

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