How to avoid accidental purchases in the game?

iOS

You can find detailed instructions on how to prevent accidental/unauthorized in-app purchases here: https://support.apple.com/en-us/HT20439.

Android

To avoid accidental purchases in the Google Play Store, please follow these steps:
  1. Access the Google Play Store.
  2. Enter the “Settings” menu.
  3. Look for “User Controls” and activate “Use password to restrict purchases”.
  4. Enter your password and tap confirm when finished.
  5. Any subsequent in-game purchase after changing your settings will require your security password.