1. Install and open the Rise of Kingdoms: Lost Crusade game app.

Click on the "Add Gems" icon at the corner top right of the screen.

2. Select the Gems package that you want.

3. The payment window will pop up, then you can click the "Google Play Balance" option.

4. On the payment confirmation page, please select Redeem Code.

5. Enter the Google Play Code you've purchased in Codashop, then click the "Redeem" button.