firebase-kotlin-sdk

Uses suspending functions and Flows instead of callbacks or platform-specific types like Task, providing a coroutine-based approach that eliminates callback hell, as shown in the README examples for Auth and Firestore.

Provides a common API binding to official Firebase SDKs for iOS, Android, JVM, and JS, enabling shared code across all targets—ideal for Compose Multiplatform apps, as stated in the project description.

Integrates Kotlinx Serialization for reading and writing custom classes to Firestore and Realtime Database, with built-in support for polymorphic serialization, server timestamps, and custom serializers, detailed in the serialization section.

Employs default arguments, infix notation, and operator overloading to simplify APIs, replacing builder patterns from the official SDKs—evidenced by the cleaner updateProfile and query examples in the README.