You might be talking about Garmin now-smartwatch devices. The first Forerunners look like something you'd strap on a bike's handlebars. They weren't referred to as smartwatches, but as "personal trainers" and didn't seem to display the time-of-day to classify as a watch. Pebbles and the predecessor InPulse seem to always have been smartwatches, though the need seems to have started by wanting to avoid taking out one's phone while on the bike. Garmin pivoted, but I don't think Pebble did.