This has improved quite a bit on recent versions of the official mobile clients. If you go to your lists, you can "pin" a list, which has the effect of making i

This has improved quite a bit on recent versions of the official mobile clients. If you go to your lists, you can "pin" a list, which has the effect of making it an alternate timeline from the app's home screen. It's a little subtle, but on home you'll now have "Home" and your list's name at the top of the screen, with the active one getting a blue underline. Swipe left or right to select one or the other.