CallApp offers a free version with basic features, while some advanced functionalities may require a subscription or in-app purchases.

Yes, CallApp requires an internet connection to provide real-time caller identification and to access its database for blocking unwanted calls.

You can contact support or send feedback through the app's settings menu, where you will find options for customer support or feedback submission. Alternatively, you can visit the official website for more contact information.

You can manage or cancel your subscription through your app store account settings or within the app's subscription management section. Detailed instructions are usually provided in the app.