Facebook Analytics for Apps

Facebook Analytics for Apps is a tool that reaches across mobile and desktop devices, helping businesses measure, understand, and optimize their customers’ journey across apps and websites. Starting today, extending this analytics support to businesses building bots on the Messenger Platform, becoming among the first analytics solutions for bots in the industry to provide actionable insights and transparency.

https://analytics.facebook.com/blog/bots-for-messenger-adding-analytics-and-fbstart-program/