The Klaviyo Ruby SDK by Klaviyo interacts with the API to implement email marketing features into web projects. Resources explain how to use the SDK with Ruby, providing code to insert Klaviyo code in an application, record customers' actions, and record events.
Facebook has added Codeless App Events to the latest version of the Facebook SDK. The new feature allows app owners to track interactions between app users with certain elements within an app (e.g. buttons, images, etc.). Codeless App Events is implemented through a visual tool to reduce coding.