British startup, Rockley Photonics is preparing to list on the New York Stock Exchange in the near future. Judging from the documents submitted by the company to the US Securities and Exchange Commission SEC, this company has an important connection with Apple. Furthermore, the company’s blood glucose measurement technology may come with the Apple Watch Series 7 in 2022. This is not the first time that this report is hitting the web. In January, there were reports that the Watch Series 7 will support blood glucose testing. Rockley Photonics, headquartered in the UK, designs and develops technology that uses infrared to monitor human blood. The sensor can not only measure heart rate, blood oxygen but also monitor blood sugar and even alcohol levels. According to the SEC documents, Rockley disclosed financial information, states that Apple is one of the company’s few large customers. The top two customers accounted for 99.6% of the company’s revenue in 2019 and 100% in 2020.