How would I know if the user is on console, mobile or PC?

[starmaq]

At the moment, there is no official way to check for that sadly. This topic by crazyman32 made a feature request for it, but it got no response.

Device Type Detection

I’ve made a similar request in the past, but I’m coming back with a more refined request. Sometimes it can be very useful to tell what type of device a user is on (such as console, PC, mobile…). However, there is currently no way to explicitly check and see what device the user is on. And so game devs are forced to do hacky tricks to figure out what device the user might be on. I emphasize “might” because it is not a guarantee and there are holes in the logic. My proposal: Player.DeviceType …

There is a :GetPlatform() method, but it can only be used by Roblox core scripts.

This page shows some possible ways you might be able to check for the console.
There is also this hacky way to do so.