Warden is a Bitwarden/Vaultwarden client for Ubuntu Touch.
I fund the development of Warden out of my own pocket. If you find the project useful and don't want it to die, please consider donating what you think the app is worth to you.
Although Warden is intended for ubuntu touch it is written completely in web technologies. This means that, if there is demand, the app can be ported to virtually any platform. The biggest problem will be CORS.