I'm trying to do push notification from my java based backend service and send message to my mobile clients (different content for each subscriber depending on their states). The broadcast will be done on a weekly basis, so like every Wednesday, I will send downstream messages to all my mobile app clients (12130 clients give or take, covering both IOS and Android).
Right now, I'm led to use GCM. Does anybody have any experience with this?
Is this the same as sending normal REST request to Google endpoint?