Mobile
Easy sign up and sign in
The sign in with Google+ button is an easy way for users to sign up and sign in to your app. This allows you to know who they are on Google+ and to build a more personalized experience for your app, all without having to create yet another username and password.
Be shared and discovered
The Share dialog provides a means for users to share rich content from your app into the Google+ stream, including links, photos and location. When users log into Google+, the stream is the first thing they see, making it core to the Google+ experience and giving your content greater visibility.
Get recommended
The +1 button is a way for users to give their public stamp of approval to any content associated with a URL. These endorsements can give your app more credibility and help it grow faster. When users +1, they can also share content with their circles.
Become part of history
The Google+ history API lets users save moments from your app to their private Google+ history. From there, they can easily share those moments with others. When users choose to share from Google+ history, they can generate high-quality conversations around your content and visits back to your site.
Build in personalization
The Google+ APIs let you create a more personalized and integrated experience by bring people and conversations into your app using public Google+ content, such as user profiles, posts, and comments.