If you’re like most people, you probably use your iPhone to access your apps and data. But if you want to delete app data from your iPhone, there are a few things you need to know. First, make sure that your app is installed on your iPhone. If it isn’t, you can uninstall it by going to the App Store and searching for the app in question. Once you find it, uninstall it by pressing the uninstall button. Second, open up Settings and select General > Reset > Reset All Settings. This will erase all of your data on your iPhone. Third, open up iTunes and go to the App Store of the app that you want to delete data from. Once there, search for the app and click on the Delete Data button. This will delete all of the data associated with that app from your iPhone.