Is this a virtual mobile phone for a computer?

✅ YES. Genymotion is an Android virtual device that runs on a computer, so it works like a virtual phone for testing and development. See Genymotion Desktop and Genymotion Emulated Features and Widgets.

It creates and runs Android virtual devices on Windows, macOS, and Linux. It is mainly meant for app development, testing, demos, and automation.

What do you want to use it for: app testing, demos, or just trying Android on your computer?