theme selection

I don't know if this is realistic to ask for but .... 

Would it be possible to allow theme selection to be controlled by a cookie (or something like that) so that a user could use rondo on a cell phone but mybb default on a desktop computer?

Thanks

[Laird]

Would it be acceptable to be logged out on one of the devices?

I ask because when not logged in, that's exactly how it does work: via a cookie. You can set whichever theme you like when logged out and it won't affect other devices.

It's only when logged in that the theme conforms to your user settings, across devices.