The official New Relic iOS SDK offers contents to install the SDK, instrument code, create interactions, create custom metrics, and track custom network requests. What the New Relic API can do for developers is to monitor web applications and manage software components. To learn more about the API, visit https://docs.newrelic.com/docs/apis
In a world where real-time data streams are becoming much more common, and with the volume of that data continuing to increase, it makes sense that a framework would be developed to increase the ease at which that data can be processed. Yahoo! S4 isn't the first such framework to be concieved, or even open sourced, but it is likely to massively increase awareness that such frameworks exist, what problems they may help solve and get developers thinking about how they could use the technology and potentially increase the likelihood of somebody moving S4-like capabilities into the cloud and offering it as as service.
Although some developers may be unaware of the prevalence of real-time APIs, they are already used by some of the world’s most popular providers. This post by Phill Leggetter for the Pusher Blog discusses five reasons why API providers should embrace a real-time API to add more value to users.