It’s disappointing
I wanted to know if my bracelet was a natural dark blue avanturine stone or some fake, but the app identified it as gold… every single second asking me to pay for subscription and than asking to submit the correct answer for my stone. Are you expecting me to pay you for the app and at the same time to teach it how to do it work?! I assume that this app asks for the right answer every time it mistakes and it mistakes a lot. This is ridiculous. At least show me that you could actually do something useful before asking for money.