Twitter recently unveiled Digits, a new way for smartphone users to log in to mobile apps. Rather than use an email address and password or social networking credentials to create app logins, Digits allows people to use their phone number. After entering their number, users will receive an SMS code and can use that to create an account and log in to the app for the first time. After that, they won't need to log in again. Digits is not associated with Twitter's main product, but it is part of the new Fabric SDK Twitter is releasing to mobile developers. Twitter believes Digits is a more user-friendly way for smartphone users to sign into apps. Digits is available on the web, as well as for Android and iOS devices.


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