Google Sign-In is a secure authentication system that reduces the burden of login for your users, by enabling them to sign in with their Google account—the same account they already use with Gmail, Play, Photos and other Google services.
Here are success stories of some Google Sign-In integrations:
Case Studies
Luxe

Luxe Google Sign-In integration on Android and iOS led to a 30% increase in registration rate and a 15% increase in activation rate.
Moovit

22% of Moovit's (Android, iOS) users sign in with either Google Sign-in or Facebook Login. On Android, 20%+ more users sign in with Google Sign-in than with Facebook Login.
Doodle

Doodle implemented Google Sign-in on its Web, iOS, and Android apps. Before using Google Sign-in, only 35% of users signed in to the app; now it has increased by over 50%. It’s even better for new users; Doodle is seeing over 75% of new app installs complete registration.
Mobills

After putting the Google button as the first option and replacing the red Google+ button, Mobills (Android, iOS, Web) saw the number of people logging in with Google increase by 300%, and become the most popular sign-in option.
Featured Apps
Lingvo Live (Android, Web): "Google Sign-In significantly increased the overall proportion of users registering across web, Android, and iOS. Users have come to prefer registration through Google, instead of email. Google has become the most popular way of registering on the web and Android platforms." —Elena Abashkina, Head of Linguistic Products Department, ABBYY
Nabd نبض (Android, iOS): "After integrating Google Sign-In in Nabd, the number of signed in users increased significantly by 25%. Google Sign-In helped us provide a seamless experience to our users across different devices and platforms." —Abdullah El‑Sayed, VP of Engineering, Nabd
Traveloka (Android, iOS, Web): "Traveloka aims to deliver the best user experience. Through Google Sign-In, customers benefit from seamless registration & login, and it has become one of the most popular login methods on our site. Launched just 2+ months ago, it's contributing a significant increase to our daily registration rate overall and especially popular among Android users." —Wayan Tresna, Senior Product Manager, Traveloka
Anghami (Android, iOS, Web): "Google Sign-In accounts for 24% of iOS logins and 30% of Android logins, up from 23% after changing from Google+. We will be highlighting Google Sign-In in the next Android update, so we expect it to take a larger share soon." —Salim Batlouni, Product Designer & Manager, Anghami
Instacart (Android, iOS, Web): "Google [Sign-in] has been working great for us at Instacart! We are especially happy about being able to create a secure login (through JSON Web Tokens) and not having to ask users for offline access permission." —Maksim Golivkin, Android Lead, Instacart
Booking.com (Android, iOS, Web): "At Booking.com, we are always creating and testing new products that enable our consumers to experience the world seamlessly. Delivering apps people love revolves around being able to offer personal, relevant and instant experiences, across devices and platforms. We believe signing in shouldn’t be a blocker to this, but rather the spring which helps people every day to easily enjoy amazing travel experiences." —Brennen Buckner, Product Owner Mobile Apps, Booking.com
Todoist (Android, iOS, Web): "Our most used authentication method on Android is, by far, Google Sign-In." —Pedro Santos, Mobile Software Engineer, Doist