Use APKPure App
Get Gems & XP Calc old version APK for Android
몇 번의 탭으로 보석 및 필요한 경험을 계산
This app help you to calculate gems and experience by just entering required values.
You can easily calculate required gems for particular resources, and experience required for next level. also you can able to calculate total experience you have already achieve for your current level.