Go to App store -> click on your details (right corner) -> click on your Apple ID -> “Subscriptions” or “Contact Apple support”.
Go to App -> click on Subscription section -> scroll down to “Manage subscriptions” link and cancel the subscription in your Google Play account.
Go to paypal.com and log in to your account. Click the Gear icon in the upper right of the screen, choose “Payments” -> “Manage Automatic Payments”. Find “Master Home Security s.r.o.” in merchants’ list and click the Cancel button.