then this app for you to do that.
This is a free app and very amazing tool, it's powerful to calculate diamonds and USD for Rush Wars
This app very is simple
Please Note:
That is an unofficial application!
* "Free Gems Calculator For Rush Wars" is only to help the gamer in calculating the cost of the gems.

Disclaimer:

This app acted as a guidance app for the game Rush Wars by Supercell. This is unofficial and not associated with Supercell. All town hall images, background, are belong to Supercell. For more information, see Supercell's Fan Content Policy http://supercell.com/en/fan-content-policy/
Important note:
- This is NOT a cheat, it provides you a way to calculate how many gems you should use.
- This is NOT an official app, it is a FREE fan app.