Google's plan is divided into three stages: the first step is running the app on your own phone, which is now available for free (in the US market); the second step is sharing with friends and family, which Google says will launch within the next few months but has not disclosed the participant limit or a specific date; the third step is publicly listing on the app store, where the rules remain unchanged, still requiring registration of a full developer account, and the app must go through the same review process as all other apps.