iPhones cannot be jail broken anymore and third party apps are forbidden, which means that if the app store decides something is not allowed then the user is SOL.
There is no lasting solution to this.
Discussion
What about browser based?
That could be a temporary work around, but if Apple wanted to censor browsers they could do that as well.
A majority of the world now accesses the internet through the app store and the play store, which provides two easy bottle necks for control.
Google certainly isn't a good guy, but android phones still provide the ability to boot a different OS and install from the zap store, obtanium, or f-droid.
It's somewhat inconvenient, but I'm doing my best not to stand inside of a fenced in area while the fence is being built.
Remoting into your own personal desktop from your phone… and use a full blown desktop web browser. It’s my go to.