when u install/login for the first time, it puts u in the beta list.
once your in check your steam
Here is an update on the beta rollout. We have now granted access to the first 2000 people who have attempted to login through the app and we plan on increasing that number steadily tomorrow and next week.
We want to make sure that the mobile experience is good for everyone who participates and the safest way to do that is to only let in a few users at a time. We appreciate the patience of those of you who have not yet received an beta invitation.
For those of you who are participating in the beta please don't forget to gift your beta key to a friend and help to grow the beta.