In this chapter, we discussed ML Kit SDK, which was announced by Firebase at Google I/O 2018. We covered different APIs provided by ML Kit, such as image labeling, text recognition, landmark detection, and more. We then created a text recognition app using on-device APIs, and then using on-cloud APIs. We also create an Face detection application by making minor changes in text recognition application.  In the next chapter, we will learn about a spam messages classifier and build a sample implementation of such a classifier for iOS.