How do WorkManager and Service components differ in Android, and in which situations is each better to use?

Service is an Android component that allows you to perform long-running operations in the background, even if the user switches to another app. A service can run in the main thread or in a separate thread, and is typically used for tasks that require continuous execution, such as playing music, tracking location, or handling network requests.

WorkManager is an Android Jetpack library for managing deferred and guaranteed execution of tasks, especially suitable for background work that must be completed even after device or app restart. WorkManager automatically considers constraints such as network availability, battery level, etc.

When to use:

• Use Service if you need to perform long tasks in real-time that require constant monitoring and interaction with the user or system.
• Use WorkManager if the task can be deferred, must be guaranteed to execute (e.g., data synchronization, backup), and resilience to device restarts is important.

Example: downloading a file in the background with guaranteed execution — WorkManager; playing music — Service.