The in-app purchase option is available in the Settings section of your app. When new users sign up, they will be added to a Forever FREE plan of Campaigns. Users can choose from different subscriber-based plans. After choosing a suitable plan, you will be redirected to the Play Store or App Store where you can make the payment. Once you upgrade to a paid plan, the changes will be automatically reflected in the app. All our subscriptions are auto-renewable so you will need to manually cancel the subscription in the store if you no longer want it to continue.