To launch an app on the App Store, you first need to create an iOS distribution provisioning profile and a distribution certificate. This is done through Xcode, where you can automatically manage signing or manually sign your app. Once you have these certificates, you can add a new app to the App Store Connect dashboard, providing details such as platform, app name, primary language, bundle ID, and SKU. You'll need to configure metadata like screenshots, description, keywords, support URL, marketing URL, icon, version number, copyright information, and contact details. After that, you can select a build to upload it through Xcode and submit your app for review. The process typically takes one to three days for approval, and in most cases, an email notification is sent at each stage of the review process. If your app is rejected due to performance issues or other reasons, you'll need to make necessary fixes before resubmitting it for review.