There isn't such a thing that I’m aware of. Purpl machines are about $1200 and meant to be way unreliable. Gemmacert that you get here are $5000 each. Then like $50,000 for a full spectrometer. Its not the sort of thing done with a reaction test.Please send me a reliable test kit so I can prove you so wrong.
There are literally thousands of testers in the US. The one Shed tipped me to in LA will accept from anywhere (but not Thailand)
Everyone who has ever had weed actually tested will tell you it comes in sometimes less than half indicated. And remember that’s your best nug on the plant you can send off - everything else will be lower.
You’re not going to be the lone outlier hitting 25%+ each time. I suspect but you don’t need to be - 17-23% fucks anyone up you got the right blend of other cannabinoids and terps.
I reckon they grow pygmy or bonsai plants just for testing as well. Something makes sense to me that they would tick higher in strength grown as small as possible.