A better way to sign in. Digits is a simple, safe way of using your phone number to sign in to your favorite apps. Freedom from passwords. No need to remember complex passwords or usernames because Digits uses SMS to control access to your accounts. Choose what you post. Digits won’t post on your behalf, so what you say and where you say it is completely up to you. Backed by Twitter. Digits safeguards your account using Twitter’s infrastructure. Digits is coming soon to these great apps.