i am secretly my boyfriends 1 viewer

my boyfriend recently started streaming himself play video games, we’re young so we don’t live together but i get the notification everytime he starts streaming and i like to just let it play while i do something. i love to watch him just be himself doing what he enjoys most. and he feels like he has someone watching, i’d like to see if i could watch it on other devices so he has more viewers, (ipad and laptop) but i don’t know how twitch works whatsoever so do i need to make another account for each device?

edit: i do it secretly because he never told me he was streaming, i found the account myself and just started watching him