Amazon Web Services announced a new "Mobile Push" for its Amazon Simple Notification Service that transmits push notifications from backend server applications to mobile apps on Apple, Google and Kindle Fire devices using a simple, unified API.
The new feature lets app developers send a message to a particular device (direct addressing), or send a message to every device that is subscribed to a particular SNS topic (broadcast).
The AWS Free Tier means all AWS customers can send one million push notifications per month across iOS, Android and Kindle platforms at no charge. After that, app developers must pay $0.50 for every million publishes and $0.50 per million push deliveries.
http://aws.amazon.com/sns/
