We - at DiaMonTech - are working on non-invasive glucose monitoring for over a decade now. It's a hard and complex problem and as long as clinical data is missing, I'm very sceptical.

We just reached (in a clinical trial) a comparable accuracy as early-stage invasive devices that got FDA approved with a shoe-box-sized device and we still have some work to do. The pre-print of our publication is here: https://www.researchsquare.com/article/rs-5289491/v1

I'm excited to see new developments but in this case, I'm not sure this will reach the market anytime soon.