Android teams often talk about automation as if the choice is simple: run it on an emulator because it is fast, or run it on a physical device because it is real. In practice, the useful answer is usually both.
Emulators are strong when the workflow needs repeatability. A stable Android Virtual Device lets you reset state, pin an API level, check a screen size, repeat a locale, and debug a route without searching for the right phone on the desk. That makes emulator automation a good first layer for smoke checks and Flow design.
Physical Android devices are the release-confidence layer. Manufacturer UI, permissions, cameras, notifications, USB hubs, screen sizes, thermal behavior, performance modes, and real touch response can change what a user actually sees. If a workflow depends on those conditions, emulator-only automation is not enough.
A practical split
For a small QA team, I would use this order:
