How to Turn off In-App Purchases in Android Devices

1.)    Open the Google Play Store app.

2.)    Select “Menu” and then “Settings”.

3.)    Look under “User Controls” and select the option to “Set or Change PIN”.

4.)    Enter your preferred code twice and make sure to check the box next to “Use PIN for Purchases”. This would ensure that no one would accidentally spend money inside apps without knowing the passcode.