1. I believe the test to be very accurate .mostly copper.was the prognosis on the sample .thank you so much for the enlightenment.There's showing too much adds that take time too much and make irritate and calculating also not working sometime... Suggest to everyone one don't waste your time on this applicationApp is very good but need to remove ads.
2. This app does not test silverIt would be better if we can find in stone test with slideThis should be have a calculate with ag or cu (other metal) for a total calculate a pure gold..if the gold a white calculate with a siver.
3. A lifetime ads free license would makes this app worthy.It does not give accurate calculations of karat.
4. It just works at ur self given figures.Shows 98% pure silver in us 5c coin.
5. Lot of difference and inaccurate resultUseless app.
6. Its not a scanner tester app.
7. 😂.
8. Correction.
9. My mistake.