United Authenticator: TOTP 2FA

Scyllarus, LLC

About this app

United Authenticator is a fast, simple two-factor authentication app. It generates time-based one-time passwords (TOTP) for the services you protect with 2FA — email, social, developer tools and more — and keeps every secret encrypted on your device.

Simple and secure
• Easy to use — add an account and your code is ready in seconds
• Local-first: your secrets are encrypted on the device with AES-GCM and stay there unless you back them up
• One master password unlocks your vault — nothing else to memorize
• No sign-up and no ads

Add accounts in seconds
• Scan a QR code with your camera
• Paste or drop a screenshot of a QR code
• Import directly from a Google Authenticator export
• Add many codes at once with batch import
• Enter a setup key by hand

Built for everyday use
• Large, tappable codes with a countdown ring
• Grid or list layouts
• Automatic issuer icons
• Search and organize your accounts
• Light and dark themes
• 6–8 digit codes, custom periods, SHA-1 / SHA-256 / SHA-512

Optional encrypted backup
• Connect Google Drive to store an encrypted copy of your vault
• Sync status shows whether your phone or the cloud copy is newer
• Restore any time, or move to a new phone without losing your codes

Snapshots and Trash
• Snapshots keep point-in-time versions of your vault
• Deleted accounts move to Trash so you can restore them

Standards-based and offline
Follows the open TOTP standard (RFC 6238), works with any service that supports authenticator apps, and keeps generating codes with no connection.

Download United Authenticator and take control of your two-factor security.