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Developers must, however, consider the user experience and make sure that advertisements do not obtrusive or interfere with the functionality of the app. In recent times, subscription models have also become more popular, particularly for content-based applications like productivity tools, news publications, and streaming services. In exchange for a regular payment, developers can give users access to premium features or content, creating a steady stream of income and a devoted following. However, it's important to provide enough value to justify the subscription cost & continuously deliver new content or updates to retain subscribers.