To save application storage, Select Settings > General > iPhone Storage. You will then get a list where you will see the space taken by each app. This is done by tapping on an app to view its data. One is able to unload unused applications or delete big applications, and restore them at a later time. This assists in space creation. What Are Applications On iPhone Storage? These consist of the app itself and additional files it stores, such a media, downloads, and cached data.