What, social lives? Get outta here with that nonsense and be a hobbit like the rest of us :)
Seriously though, if you’re thinking on a phone I’d reccomend just creating a second profile instead of getting a whole new device. The apps won’t be running when the profile is running, and as a bonus you can usually restrict the profile’s permissions. Also consider checking out web wrappers (e.g. frost) or PWAs.
On a desktop you can always just use the web version, bonus points if you auto clear cookies or have a separate profile.
Edit: if you already have a spare then that might work better than profiles.