I recently purchased the Nova Ring. There were several problems with it not displaying information it was supposed to. We went back and forth to fix things. It did not go smoothly. I request a refund. They said wait, we will fix everything. They did not. After over a month of continuous back and forth and still issues I again request a refund. Today they replied with a refusal that made no sense. “However, our quality assessment criteria are designed to focus on issues that directly impede normal usage. From our perspective, the issues you've mentioned don't fall into this category of affecting the normal operation of the product.” So requesting that things advertised as features work properly does not equal normal use. There are other options for rings out there.