Annie_M
Moderator
Maybe that's how it is on iOS 11. I'm on 10.1.1. Pretty sure I've had the "always" option all along. I have 11 weather related apps, and it's split about half with "always" and half without. I don't think it matters. With Always on, the app can access your GPS even while in the background and may help while traveling away from home. Other than that, there's no difference.
Interesting point and I bet you are right!