Bought this pretty expensive device and believed I was able to use it without having to pay an expensive subscription fee in addition. But now my free trial period has expired and the app now only show three numbers with no history. I will say that this is almost useless. And if you were to advertise this product as it should be without the subscription, no one will pay 400 dollars for a ring that is only able to provide three numbers. I would almost call this a robbery. And I will be selling this ring if I’m able to. What a scam!!!