Technically ALL simulators need a computer, be it housed in an Android, or an imbedded device.

There are simulators for consoles as well, but most produce less than satisfactory results, primarily due to the controllers.

There is a vast difference between using an Android screen to control a sim or a game console controller, compared to even the cheapest USB RC controller.

If you want to save money, try out FMS (it's free ) and a $18.00 USB RC controller.