Can I pass a value through of whether it is Web or Mobile?

I want to see when my lead comes through whether it's web or mobile 

We do have Form Analytics where you can track your visitors. You will be able to see the user's device in the Traffic tab. Please check these links:

Introducing-Form-Analytics
Understanding-Form-Analytics-and-Ways-on-How-to-Get-Your-User-s-Info

You may also display the user's browser details in the email notification. Here's how: hHow-to-Catch-User-s-Browser-Info.

Hope that helps. Thank you.