Amazon Web Services announced a new Simple Notification Service for Apple, Google, and its own Fire devices that allows developers to send notifications to all of these platforms via one, unified API. The new service is free for up to one million notifications per month, and then $0.50 per each additional million messages published. This move comes on the back of analysis that reveals that users want to be updated about things that they care about, even when they’re not in the app itself. Indeed, Microsoft is pushing Windows Azure as a platform for mobile services, including push alerts, so expect to see more news around development push notifications in the coming months.