DualisOne Authenticator

DualisOne Authenticator generates the six-digit verification codes that protect your accounts with two-step verification — entirely on your device, with no account to create and no connection to anything.

WORKS WITHOUT A CONNECTION
Codes are calculated from a setup key and the current time, not fetched from a server. They work in flight mode, underground, or with the SIM removed. The app has no internet permission at all, so it cannot send your data anywhere even if it wanted to.

SET UP IN SECONDS
• Scan the QR code shown by any service that supports two-step verification
• Or type a setup key by hand if you cannot scan
• Works with the standard used by Google, Microsoft, Amazon Web Services, GitHub, Facebook and thousands of other sites

BUILT FOR EVERYDAY USE
• Clean list of your codes with a countdown ring on each one
• Tap a code to copy it
• Search when you have a long list
• Swipe to remove an account, with a confirmation so nothing goes by accident
• Light and dark themes

YOUR KEYS STAY ON YOUR PHONE
• Setup keys are encrypted with a key held in your device's secure hardware — the Android Keystore, using StrongBox where your phone provides it
• Cloud backup and device-to-device transfer are switched off, so your second factor cannot be restored by anyone who restores a backup
• No analytics, no advertising identifier, no third-party trackers
• Nothing is uploaded, so there is nothing for us to read

MOVING TO A NEW PHONE
Transfer codes lets you pick which accounts to move, shows them as a single QR code, and offers to remove them from the old device once you have checked they arrived. It uses the standard transfer format, so your codes can move to or from other authenticator apps as well.

TIME MATTERS
Because codes are derived from the clock, a phone whose time has drifted will produce codes that services reject. If that happens, turn on automatic date and time in your phone settings.

BEFORE YOU START
Verification codes are a second factor, not a backup. If you lose this phone without transferring your codes, you will need the recovery or backup codes each service gave you when you turned on two-step verification. Save those somewhere safe.