Second (2FA)

Secure 2FA Authenticator

Only for iPhone

$0.99

iPhone

Open-source 2FA authenticator with auditable code. Scan or enter accounts, generate TOTP codes, and sync via end-to-end encrypted iCloud. No ads or tracking. Second is an open‑source 2FA authenticator with transparent, auditable code to help you generate time‑based one‑time passwords (TOTP) securely. Key features: • Open‑source and auditable • Add accounts by QR scan or manual entry • Real‑time TOTP codes • End‑to‑end encrypted iCloud sync (optional) • Local Keychain encryption • Search and sort for easy management • One‑tap copy • No ads, no tracking Works with any TOTP‑compatible service, including Google, Microsoft, GitHub, Amazon, and more. Privacy first: • No personal data collection • Data is encrypted on device • iCloud sync uses end‑to‑end encryption

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The developer, 兴毅 廖, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Seller
    • 兴毅 廖
    Size
    • 2.7 MB
    Category
    • Utilities
    Compatibility
    Requires iOS 16.0 or later.
    • iPhone
      Requires iOS 16.0 or later.
    Languages
    • English
    Age Rating
    4+
    Copyright
    • © 2026 Kada Liao
  • Developer Website
  • Privacy Policy

    • Supports

    • Family Sharing

      Up to six family members can use this app with Family Sharing enabled.

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