 Using the smart ring as another reason to stay within its suite of products. The Galaxy Ring's main competition is the Aura Ring, which works with any phone and starts at $300, plus a monthly subscription. No subscription is needed for the Samsung, but it's $100 more expensive. It's pricey when you think about it in the context that this is an accessory to an accessory, which it is. With TechTrends, I'm Mike Dabusky, ABC News.