A. To prevent automatic subscription activation, check the app settings after installation. Look for any options related to subscriptions or auto-renewal and disable them. Additionally, review the terms and conditions during the sign-up process to ensure you are not agreeing to automatic renewals without realizing it.

B. If you have already been charged, you can manage your subscriptions through your device's settings. On iOS, go to Settings > [your name] > Subscriptions, and on Android, go to Google Play Store > Menu > Subscriptions. Here, you can cancel any unwanted subscriptions.