Your thread title and post are regarding two different things, therefore, I will edit the title to reflect the post. Anyway, Unless someone, possibly a parent, has enabled restriction to prevent you from installing and deleting apps, you will not be able to without permission or having access to the restriction settings. In regard to the comment in your post, the easiest way to transfer photos into iCloud is to enable the iCloud Photo Library option on the device in the settings. Settings - iCloud - Photos and then enable "iCloud Photo Library".