Different movement speeds over network

Multi-player is a part of my game - at the moment it consists solely of each of the players flying a spaceship around
However, I noticed that when I tested it using the Editor on my PC and on my Android phone at the same time, the spaceship on my PC moved a fair bit faster than the one on my phone
I’m using

transform.Translate(0, 0, speed * Time.timeScale)

Any ideas on why this is happening, and how I could go about rectifying it?
Thanks

Use speed * Time.deltaTime.

timeScale is the speed that the game is running - nothing to do with the frame rate on the device.