I totally doubt it’s illegal, but the argument hinges on the trademarked name, not the export tool tech. “Provides functionality with top smartwatches” has no chance of a cease and desist, but “provides functionality with Garmin” might get you one.
Even then, trademark can only be used to prevent impersonation. I can put “better than Google” on my search engine, and as long as there is an obvious disassociation it is not trademark infringement. However, anyone can sue for anything with the goal of bankruptcy.
Even then, trademark can only be used to prevent impersonation. I can put “better than Google” on my search engine, and as long as there is an obvious disassociation it is not trademark infringement. However, anyone can sue for anything with the goal of bankruptcy.