The apps mentioned on this list support all the iPhones that are officially supported by Apple. That means they will work with iPhone 6, iPhone 6S, iPhone 7 and 7 Plus, iPhone 8, iPhone X, iPhone SE, and SE2, iPhone 11, iPhone XR, iPhone XS and XS Max, iPhone 12, iPhone 12 mini, iPhone 12 Pro, and iPhone 12 Pro Max, iPhone 13, iPhone 13 mini, iPhone 13 Pro, and iPhone 13 Pro Max, and iPhone 14, iPhone 14 Max, iPhone 14 Pro and iPhone 14 Pro Max. That said, you will have a better experience when using an iPhone with a larger screen.