6num – The fast, secure authenticator for 2FA. No ads, no tracking, local encryption, and optional backups in your own Nextcloud. Sort and categorize your codes with tags and profiles like "Private" or "Business," automatically load favicons for websites, use different color themes and countdown timers, and much more.

6num is available for free in Apple’s App Store for iOS devices and on Google Play, and was developed with the goal of providing an attractive 2FA app with numerous options for better organization.

• Scan the service's QR code—done
• Or enter the secret manually if no QR code is available
• Supports the open TOTP standard (RFC 6238) and is compatible with all major services (GitHub, Google, Microsoft, Amazon, Nextcloud, banking portals, and many more)
   

• Multiple profiles (e.g., Personal / Business) with completely separate account lists, names, and icons
• List or grid view
• Tags with custom colors for filtering
• Icons automatically generated from the website’s favicon or from a curated icon set
• Freely sortable via drag-and-drop
   

• Secrets are stored exclusively in encrypted form in your device's secure system storage (Keychain/Keystore)
• No servers, no accounts, no tracking, no ads
• Optional, end-to-end-encrypted backup on your own Nextcloud server—you retain full control over your data
   

• Detailed view with large code and selectable countdown style (ring, bar, or digital display)
• Light, dark, or automatic mode, optional background color gradients
• Custom app name, icon, and accent color (automatically retrieved from a website or selected manually)
• German and English, selectable automatically or manually

6num stores your two-factor codes locally and encrypts them—ideal for anyone looking for a fast, ad-free, and data-efficient authenticator app.