Why didn’t you make it just a button which activates the watch? It’d be an addon to pebble watch. It couldn’t be used standalone, but you could make it rechargeable and it would solve your issue (actions with only one hand)
It can work exactly like that, if you have a Pebble. But it works standalone as well.
It can work exactly like that, if you have a Pebble. But it works standalone as well.