Setapp supports apps for iPhones and iPads. However, every iOS app in Setapp has its own requirement for a minimum iOS version.
We recommend updating your device to the latest available iOS version; this allows you to use any mobile app from Setapp without hesitations on whether your device is supported.
We don't currently have watchOS and tvOS apps available in our library.
Please note that not all apps in Setapp have iOS versions. Read more here.