One interesting finding in a new report exploring SDK usage in Android apps is the rapidly growing popularity of Firebase, an app platform from Google that provides Backend-as-a-Service functionality.

Firebase Cloud Messaging has gained support for token-based authentication for APNs, and the client SDK has received simpler connection and registration logic.

Android mobile app developers use more analytics SDKs than any other type, according to the latest data from SafeDK Mobile, which also noted big growth in usage of Google's Firebase back-end offering.