Visual Studio Online Application Insights, available in public preview , is an analytics solution for any developer working on any application, providing a comprehensive 360° view of your application’s performance, availability and usage. With the public preview, Microsoft is launching a new cloud-friendly pricing model based on telemetry volume per app and designed to offer a great feature-complete free pricing tier.
Originally designed to provide the best analytics experience for ASP.NET and Windows app developers, Application Insights now comes with built-in support for a wide set of platforms. From rich J2EE server app supports, to iOS and Android device app analytics based on HockeyApp’s industry-leading crash analytics support, as well as Node.js, PHP, Python, Ruby and WordPress.
Application Insights provides intuitive views and powerful tools to allow fast troubleshooting and diagnostics, helps analyze user activity and adoption, and prioritizes future investments accordingly. And Application Insights offers easy integration with a range of IDEs, from Visual Studio to Eclipse and XCode.
for more information : http://azure.microsoft.com/en-us/services/application-insights/