Check, it has a PWA that works offline and syncs when back online.
I am either an idiot or that is not working for me on my android phone. I have used PWAs before and I remember you can use them by tapping the "install" in the browser menu.
I installed Silverbullet via docker on my rpi4, but when I connect to it my browsers do not give me the option to install it as a PWA. I tried Mull, DuckDuckGo browser and even (gah!) Chrome.
I can only put a shortcut on my home screen, but that then goes to the IP of my rpi4 and when I am not online I cannot reach it.
Do I need to configure something that I forgot or is the shortcut on the home screen the "PWA"?