On iOS: tap the share button in browser => add to home screen
On Android: tap the 3 dot menu button in browser => tap "install" or "add to home screen"
I tried Hermit and noticed that Voyager doesn't automatically switch between Dark and Light theme (in the night / morning). Workaround is to kill (force close) the app and open it again.
Do you also face this issue? I can't remember if with Chrome I was facing it..