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There is a company that (allegedly) already produces such a device: https://www.knowlabs.co/

I've looked over the studies/tests they've done and they look decent, though the accuracy is not that great.

I initially got excited about this (and know people who would really love this to exist), but after a bit of digging, I am convinced that this is likely a scam. This report explains why it is: https://whitediamondresearch.com/research/know-labs-is-an-ob....

You could also look at the stock economics to see that this company has not behaved like one with a bright future.

Yeah, the stock price made me suspicious but I figured that it might be due to the not-so-great accuracy plus a lack of moat - even if it worked, you'd see a cheap copy on AliExpress in 2 weeks. I didn't see the report before though, so yeah, I'd agree it smells like scam. Especially when you see the CEO dabbles in NFTs

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