A group of 71 organizations has written an open letter to Google expressing opposition to the company's plan to require all Android app developers to register centrally with Google in order to distribute applications outside of the Google Play Store. The organizations argue that this policy threatens innovation, competition, privacy, and user freedom, and that existing security measures are sufficient to protect Android users. They urge Google to withdraw this policy and work with the open-source and security communities on less restrictive alternatives. The policy is set to take effect worldwide in the coming months.