@SteveMoser I don't know—my first reaction was definitely not, but I'm against most new tags unless they're obviously necessary, which I didn't think either of these were. I approved your tag wiki excerpts, but wondered if they were really necessary?
@grgarside I guess that is a good point with tagging both as that is what I did with my question so I should probably change that. To me tagging something as with the hardware tag or software tag helps me to immediately narrow down the question as being hardware or software related. I think the activity.app tag is important though as just another future proofing if Apple allows one to use the iOS activity.app with a device other than apple-watch.