To avoid accidental in-app purchases, change your device settings:
- 
Open the Play Store app.
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Tap the Menu icon and select Settings.
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Tap Require authentication for purchases.
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Select one of the authentication options:
 
– For all purchases through Google Play on this device. Authentication will be required for all Google Play purchases (including in-app purchases).
– Every 30 minutes. The system will request the password for Google Play purchases every 30 minutes.
❗️ Just note that once you enter a password, all purchases made during the following 30 minutes will not need a password.
- Follow the instructions on the screen.