Google says you can reach over a billion devices with this free cloud messaging service – CBR gives you the main features of GCH.
The GCM service was first announced as a successor to Google’s Android Cloud to Device Messaging (C2DM) service, which first featured in Android 2.2. The newest version of GCM is Firebase Cloud Messaging (FCM), with all GCM users strongly recommended to upgrade to FCM in order to benefit from the new features and functionality. The switch to FCM was part of the Alphabet restructuring at Google, with Firebase sitting under the parent company Alphabet.
According to Google, FCM inherited GCM’s core infrastructure, with new SDKs to make cloud messaging development easier.
Upgrading to FCM SDK promises simpler client development, with the need to write your own registration or subscription retry logic no longer required.
The new FCM SDK also delivers an out-of-the-box notification solution – developers 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.
With FCM, developers can send unlimited upstream or downstream messages, handle all aspects of queuing and delivery, optimise for battery efficiency and send messages to individual devices or user segment.