How do you tell if the App Store costs money?
The payment mechanism of the app store is not uniform. Free apps may include in-app purchases or be supported by advertising revenue. Users need to carefully evaluate the application's functionality, frequency of use and personal needs, rather than simply judging whether it is free or not. Evaluate whether in-app purchases are necessary and whether ads will affect the user experience to make an informed choice. Ultimately, rational evaluation is the key to deciding whether to pay.