Welcome to the community!
At the moment, Fido does not support cellular services for smartwatches. It is unlikely anyone here will be privy as to if, or when, Fido will provide support for smartwatches.
@vballstar10 wrote:...do you have to pay monthly or at all!! ...
Judging by the providers which currently do support smartwatches, if Fido decides support smartwatches in the future, there will likely be a smartwatch plan for an additional monthly fee.
Hope this helps