make an account
Be able to make an account so you can have it across all your devices.
Duplicate, please vote for http://seriesguide.uservoice.com/forums/189742-general/suggestions/3525119-sync-shows-across-devices instead!
Would dearly love this, for multiple devices and easy installation to new devices
Isn't this why there's trakt.tv and getglue synchronization?
Rami Selin commented
Doesn't a trakt account do the job?