Go to cohost.org on your phone (iOS or Android) and hit the Share button (square with an up arrow) and do “Add to Home Screen”
Not as good as an app proper, but mimics the experience and makes it easier to use imo

Avatar by @DrDubz.
Banner by one of Colin Jackson, Rick Lodge, Steve Noake, or David Severn from Bubsy in: Fractured Furry Tales for the Atari Jaguar.
Go to cohost.org on your phone (iOS or Android) and hit the Share button (square with an up arrow) and do “Add to Home Screen”
Not as good as an app proper, but mimics the experience and makes it easier to use imo