wSH
A real version of Alpine Linux right in an iOS app!
This app is installed via a mobileconfig. Apple can't remove this app from the App Store if it isn't even there!
No internet is required to use wSH once you have it installed and have opened it at least once with an internet connection.
An on-screen keyboard with buttons like CTRL and ALT will appear when using wSH, so you can actually use Linux.
Full internet support is included, by using the relay link, wss://relay.widgetry.org.
Just like Alpine Linux, this app is completely free.
All changes made in Linux will be saved as long as you press the "Save" button in the top left corner of your screen.