This method describes, how to redeem 100 gems, use the same IAPs, you are given promo code for.
- Open IAP screen within the game.
2. Select the IAP you want to Redeem.
3. Select your payment method and it will show you two options, payment methods and Redeem.
4. Select redeem and enter the code provided.
5. Press redeem, coins or gems will be added to your game account.