Skip to content

Emulator vs. Simulator

Question

Explain difference between emulator and simulator.

Short interview answer

An emulator reproduces a target device environment closely enough to run target-platform software; a simulator reproduces selected behavior without necessarily reproducing the target hardware or full operating environment. In practice, use the platform documentation for the exact tool’s limits and test important behavior on real devices.

Detailed answer

The labels are less important than the fidelity of the test. Device-specific behavior such as sensors, graphics performance, battery use, notifications, hardware-backed security, network variability, and OS integration can differ from desktop-hosted tools. Use a virtual device to accelerate development and automate repeatable scenarios, then validate release-critical flows on representative physical devices. Treat an emulator or simulator result as evidence for the environment it models, not proof that every real-device condition is correct.

Sources