Both! 😉 I think I can design it so that the code can basically be the same for web & mobile.

WIP: https://w3.do/fj3CLVVd Still drawing it out, but feel free to give feedback and steer me in certain directions.

I'm imagining it from the perspective of a company (Coinkite f.e.) that would want easy sharing options of the different logins to send to their employees etc.