As someone who has used an insertable Continuous Glucose Monitor (CGM) for about 10 years, I promise you this will not be accurate enough to be medically useful. Some of the existing (FDA Approved) inserted CGMs are off so wildly that they need to be calibrated every 4 hours. Even with recalibration, they can be significantly off. This may be a fun toy, but will not work well enough to be relied upon. I would love it if it actually worked, but the thing is, the objection people have with CGMs is not that they need to be inserted. It's the accuracy. Anyone who depends on one would be happy to continue to insert one if it could be relied upon as an accurate tool. Making it non-inserted, but inaccurate, is no better, and in fact worse, than what currently exists. I guess we'll soon see, but I'm not getting my hopes up.