On stage at Facebooks F8 developer conference, CEO Mark Zuckerberg just announced that Facebooks users will soon be able to sign into third-party apps anonymously without revealing their personal details. Some people are scared of pressing this blue button, Zuckerberg said of the login with Facebook icon. If youre using an app that you dont completely trust or youre worried might spam your friends, youre not going to give it a lot of permissions. Anonymous login solves all of this by hiding your personal information from developers until youve used it and are comfortable handing those details over. Anonymous login serves as a hassle-free and risk-free way to login and try apps, and that same anonymous login data can be synced across devices so you wont need to repeat the process over and over again.