Earlier quoted context omitted.
Jailbreaking doesn't count.
No jailbreaking necessary. Edit: Can't reply further, but the way of doing this is much the same as installing unsigned apps on an xbox. Using a (free) developer account you can sideload things quite easy using something like https://github.com/ios-control/ios-deploy
Anyone who pushes Web Apps as a viable option is being disingenuous about what it provides or purposely ignorant.